java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-6-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-e1a14da [2018-12-24 13:59:35,811 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-24 13:59:35,815 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-24 13:59:35,827 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-24 13:59:35,827 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-24 13:59:35,828 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-24 13:59:35,830 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-24 13:59:35,831 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-24 13:59:35,833 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-24 13:59:35,838 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-24 13:59:35,840 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-12-24 13:59:35,882 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2018-12-24 13:59:35,894 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-24 13:59:35,894 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-24 13:59:35,895 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-24 13:59:35,895 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-24 13:59:35,895 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-24 13:59:35,896 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-24 13:59:35,896 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2018-12-24 13:59:35,896 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-24 13:59:35,896 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-24 13:59:35,897 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-24 13:59:35,897 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-24 13:59:35,897 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-24 13:59:35,897 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-24 13:59:35,897 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-24 13:59:35,901 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-24 13:59:35,901 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-24 13:59:35,902 INFO L133 SettingsManager]: * Use SBE=true [2018-12-24 13:59:35,902 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-24 13:59:35,902 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-24 13:59:35,902 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-24 13:59:35,902 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-24 13:59:35,903 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-24 13:59:35,903 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-24 13:59:35,903 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-24 13:59:35,903 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-24 13:59:35,903 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-24 13:59:35,906 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-24 13:59:35,906 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-24 13:59:35,906 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-24 13:59:35,906 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-24 13:59:35,907 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-24 13:59:35,907 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-24 13:59:35,907 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-24 13:59:35,907 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-24 13:59:35,907 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-24 13:59:35,908 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-24 13:59:35,908 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-24 13:59:35,908 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-24 13:59:35,908 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-24 13:59:35,908 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-24 13:59:35,950 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-24 13:59:35,965 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-24 13:59:35,969 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-24 13:59:35,971 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-24 13:59:35,972 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-24 13:59:35,972 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-6-unlimited.bpl [2018-12-24 13:59:35,973 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-6-unlimited.bpl' [2018-12-24 13:59:36,021 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-24 13:59:36,023 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-24 13:59:36,024 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-24 13:59:36,024 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-24 13:59:36,024 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-24 13:59:36,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:36" (1/1) ... [2018-12-24 13:59:36,056 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:36" (1/1) ... [2018-12-24 13:59:36,083 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-24 13:59:36,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-24 13:59:36,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-24 13:59:36,085 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-24 13:59:36,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:36" (1/1) ... [2018-12-24 13:59:36,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:36" (1/1) ... [2018-12-24 13:59:36,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:36" (1/1) ... [2018-12-24 13:59:36,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:36" (1/1) ... [2018-12-24 13:59:36,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:36" (1/1) ... [2018-12-24 13:59:36,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:36" (1/1) ... [2018-12-24 13:59:36,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:36" (1/1) ... [2018-12-24 13:59:36,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-24 13:59:36,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-24 13:59:36,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-24 13:59:36,123 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-24 13:59:36,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:36" (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 [2018-12-24 13:59:36,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-24 13:59:36,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-24 13:59:36,688 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-24 13:59:36,689 INFO L280 CfgBuilder]: Removed 15 assue(true) statements. [2018-12-24 13:59:36,689 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 01:59:36 BoogieIcfgContainer [2018-12-24 13:59:36,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-24 13:59:36,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-24 13:59:36,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-24 13:59:36,696 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-24 13:59:36,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:36" (1/2) ... [2018-12-24 13:59:36,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73cb1450 and model type speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.12 01:59:36, skipping insertion in model container [2018-12-24 13:59:36,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 01:59:36" (2/2) ... [2018-12-24 13:59:36,702 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-6-unlimited.bpl [2018-12-24 13:59:36,720 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-24 13:59:36,731 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2018-12-24 13:59:36,746 INFO L257 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2018-12-24 13:59:36,784 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-24 13:59:36,784 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-24 13:59:36,784 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-24 13:59:36,785 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-24 13:59:36,785 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-24 13:59:36,785 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-24 13:59:36,785 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-24 13:59:36,786 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-24 13:59:36,800 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2018-12-24 13:59:36,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-12-24 13:59:36,807 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:36,808 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2018-12-24 13:59:36,812 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:36,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:36,821 INFO L82 PathProgramCache]: Analyzing trace with hash 988, now seen corresponding path program 1 times [2018-12-24 13:59:36,823 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:36,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:36,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:36,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:36,874 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:37,027 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 13:59:37,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-12-24 13:59:37,028 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 13:59:37,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-24 13:59:37,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-24 13:59:37,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 13:59:37,049 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2018-12-24 13:59:37,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:37,275 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2018-12-24 13:59:37,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 13:59:37,278 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-12-24 13:59:37,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:37,292 INFO L225 Difference]: With dead ends: 29 [2018-12-24 13:59:37,292 INFO L226 Difference]: Without dead ends: 24 [2018-12-24 13:59:37,295 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 [2018-12-24 13:59:37,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-24 13:59:37,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2018-12-24 13:59:37,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-24 13:59:37,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 25 transitions. [2018-12-24 13:59:37,328 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 25 transitions. Word has length 2 [2018-12-24 13:59:37,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:37,329 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 25 transitions. [2018-12-24 13:59:37,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-24 13:59:37,330 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 25 transitions. [2018-12-24 13:59:37,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 13:59:37,330 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:37,330 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 13:59:37,331 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:37,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:37,331 INFO L82 PathProgramCache]: Analyzing trace with hash 30376, now seen corresponding path program 1 times [2018-12-24 13:59:37,332 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:37,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:37,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:37,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:37,333 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:37,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:37,469 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:37,470 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 13:59:37,472 INFO L207 CegarAbsIntRunner]: [0], [18], [27] [2018-12-24 13:59:37,510 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:37,510 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:37,589 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:37,591 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 64 root evaluator evaluations with a maximum evaluation depth of 2. Performed 64 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 13:59:37,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:37,599 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:37,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:37,600 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:37,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:37,617 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:37,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:37,888 WARN L181 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2018-12-24 13:59:37,939 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,947 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 13:59:38,262 WARN L181 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2018-12-24 13:59:38,275 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,278 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,281 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 13:59:38,480 WARN L181 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2018-12-24 13:59:38,514 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,518 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,522 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,524 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,527 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 13:59:38,699 WARN L181 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2018-12-24 13:59:38,706 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,711 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,713 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,716 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,717 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,718 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,721 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 13:59:38,723 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:38,773 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:38,805 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:38,846 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:38,926 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 13:59:38,936 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 13:59:38,964 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 13:59:38,989 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 13:59:39,008 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 13:59:39,154 INFO L303 Elim1Store]: Index analysis took 141 ms [2018-12-24 13:59:39,157 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 13:59:39,160 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:39,409 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:39,440 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:39,465 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:39,481 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:39,494 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:39,537 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:39,538 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2018-12-24 13:59:39,625 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,627 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 13:59:39,629 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:39,677 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:39,678 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:50 [2018-12-24 13:59:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:39,750 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:39,801 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:39,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 13:59:39,801 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:39,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 13:59:39,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 13:59:39,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 13:59:39,803 INFO L87 Difference]: Start difference. First operand 14 states and 25 transitions. Second operand 6 states. [2018-12-24 13:59:40,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:40,226 INFO L93 Difference]: Finished difference Result 47 states and 68 transitions. [2018-12-24 13:59:40,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 13:59:40,227 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 13:59:40,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:40,228 INFO L225 Difference]: With dead ends: 47 [2018-12-24 13:59:40,228 INFO L226 Difference]: Without dead ends: 45 [2018-12-24 13:59:40,230 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 13:59:40,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-12-24 13:59:40,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 18. [2018-12-24 13:59:40,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-24 13:59:40,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 37 transitions. [2018-12-24 13:59:40,236 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 37 transitions. Word has length 3 [2018-12-24 13:59:40,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:40,237 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 37 transitions. [2018-12-24 13:59:40,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 13:59:40,237 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 37 transitions. [2018-12-24 13:59:40,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 13:59:40,238 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:40,238 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 13:59:40,239 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:40,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:40,239 INFO L82 PathProgramCache]: Analyzing trace with hash 30004, now seen corresponding path program 1 times [2018-12-24 13:59:40,239 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:40,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:40,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:40,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:40,241 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:40,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:40,345 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:40,345 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 13:59:40,345 INFO L207 CegarAbsIntRunner]: [0], [6], [27] [2018-12-24 13:59:40,347 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:40,347 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:40,355 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:40,355 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 64 root evaluator evaluations with a maximum evaluation depth of 2. Performed 64 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 13:59:40,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:40,356 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:40,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:40,356 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 13:59:40,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:40,367 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:40,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:40,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:40,442 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 13:59:40,457 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 13:59:40,475 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:40,477 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:40,479 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 13:59:40,523 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:40,525 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:40,527 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:40,528 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 13:59:40,543 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:40,545 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:40,547 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:40,548 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:40,551 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 13:59:40,679 INFO L303 Elim1Store]: Index analysis took 123 ms [2018-12-24 13:59:40,681 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 13:59:40,682 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:40,730 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:40,761 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:40,779 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:40,797 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:40,816 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:40,985 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:40,986 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 13:59:41,169 WARN L181 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2018-12-24 13:59:41,178 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,179 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,180 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 13:59:41,224 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,225 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,226 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,227 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,229 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 13:59:41,278 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,279 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,280 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,281 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,285 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 13:59:41,286 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:41,303 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:41,329 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:41,350 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:41,385 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:41,385 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:72, output treesize:71 [2018-12-24 13:59:41,485 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,487 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 13:59:41,488 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:41,521 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:41,522 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:50 [2018-12-24 13:59:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:41,534 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:41,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:41,567 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-24 13:59:41,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2018-12-24 13:59:41,567 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 13:59:41,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 13:59:41,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 13:59:41,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 13:59:41,568 INFO L87 Difference]: Start difference. First operand 18 states and 37 transitions. Second operand 4 states. [2018-12-24 13:59:41,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:41,694 INFO L93 Difference]: Finished difference Result 23 states and 60 transitions. [2018-12-24 13:59:41,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-24 13:59:41,694 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-12-24 13:59:41,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:41,696 INFO L225 Difference]: With dead ends: 23 [2018-12-24 13:59:41,696 INFO L226 Difference]: Without dead ends: 22 [2018-12-24 13:59:41,697 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 13:59:41,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-24 13:59:41,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-12-24 13:59:41,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-24 13:59:41,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 59 transitions. [2018-12-24 13:59:41,703 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 59 transitions. Word has length 3 [2018-12-24 13:59:41,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:41,703 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 59 transitions. [2018-12-24 13:59:41,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 13:59:41,704 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 59 transitions. [2018-12-24 13:59:41,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 13:59:41,704 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:41,704 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 13:59:41,705 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:41,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:41,705 INFO L82 PathProgramCache]: Analyzing trace with hash 30562, now seen corresponding path program 1 times [2018-12-24 13:59:41,705 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:41,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:41,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:41,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:41,707 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:41,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:41,786 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:41,786 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 13:59:41,786 INFO L207 CegarAbsIntRunner]: [0], [24], [27] [2018-12-24 13:59:41,790 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:41,790 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:41,798 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:41,798 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 64 root evaluator evaluations with a maximum evaluation depth of 2. Performed 64 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 13:59:41,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:41,799 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:41,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:41,799 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:41,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:41,809 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:41,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:41,876 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,877 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 13:59:41,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,929 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,931 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 13:59:42,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,129 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,131 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,133 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 13:59:42,230 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,247 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,248 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,249 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,250 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,250 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,252 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 13:59:42,334 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,336 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,338 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,342 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,346 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,348 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,349 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 13:59:42,350 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,379 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,406 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,434 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,478 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,569 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 13:59:42,573 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 13:59:42,579 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 13:59:42,585 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 13:59:42,590 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 13:59:42,599 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 13:59:42,600 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,658 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,682 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,700 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,843 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,856 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,917 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:42,919 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:92, output treesize:91 [2018-12-24 13:59:42,987 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,988 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 13:59:42,990 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:43,057 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:43,057 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2018-12-24 13:59:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:43,076 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:43,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:43,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 13:59:43,211 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:43,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 13:59:43,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 13:59:43,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 13:59:43,212 INFO L87 Difference]: Start difference. First operand 21 states and 59 transitions. Second operand 6 states. [2018-12-24 13:59:43,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:43,412 INFO L93 Difference]: Finished difference Result 39 states and 79 transitions. [2018-12-24 13:59:43,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-24 13:59:43,413 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 13:59:43,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:43,414 INFO L225 Difference]: With dead ends: 39 [2018-12-24 13:59:43,415 INFO L226 Difference]: Without dead ends: 36 [2018-12-24 13:59:43,415 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 13:59:43,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-24 13:59:43,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 23. [2018-12-24 13:59:43,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-24 13:59:43,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 67 transitions. [2018-12-24 13:59:43,423 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 67 transitions. Word has length 3 [2018-12-24 13:59:43,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:43,423 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 67 transitions. [2018-12-24 13:59:43,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 13:59:43,424 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 67 transitions. [2018-12-24 13:59:43,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 13:59:43,424 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:43,425 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 13:59:43,425 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:43,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:43,425 INFO L82 PathProgramCache]: Analyzing trace with hash 30128, now seen corresponding path program 1 times [2018-12-24 13:59:43,426 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:43,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:43,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:43,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:43,427 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:43,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:43,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:43,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:43,492 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:43,492 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 13:59:43,492 INFO L207 CegarAbsIntRunner]: [0], [10], [27] [2018-12-24 13:59:43,495 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:43,495 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:43,501 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:43,501 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 64 root evaluator evaluations with a maximum evaluation depth of 2. Performed 64 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 13:59:43,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:43,502 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:43,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:43,502 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 13:59:43,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:43,517 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:43,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:43,616 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 13:59:43,622 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 13:59:43,628 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,630 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,631 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 13:59:43,647 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,648 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,650 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 13:59:43,686 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,688 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,690 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,692 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 13:59:43,828 INFO L303 Elim1Store]: Index analysis took 132 ms [2018-12-24 13:59:43,829 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 13:59:43,830 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:43,961 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:43,987 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:44,008 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:44,025 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:44,038 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:44,071 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,072 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 13:59:44,106 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,107 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,109 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 13:59:44,166 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,167 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,168 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,169 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,171 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 13:59:44,224 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,225 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,227 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,228 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,229 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,231 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,232 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 13:59:44,233 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:44,252 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:44,270 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:44,291 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:44,331 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:44,332 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2018-12-24 13:59:44,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,407 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 13:59:44,408 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:44,554 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:44,554 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:50 [2018-12-24 13:59:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:44,571 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:44,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:44,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 13:59:44,609 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:44,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 13:59:44,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 13:59:44,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 13:59:44,610 INFO L87 Difference]: Start difference. First operand 23 states and 67 transitions. Second operand 6 states. [2018-12-24 13:59:44,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:44,798 INFO L93 Difference]: Finished difference Result 49 states and 101 transitions. [2018-12-24 13:59:44,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 13:59:44,799 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 13:59:44,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:44,801 INFO L225 Difference]: With dead ends: 49 [2018-12-24 13:59:44,801 INFO L226 Difference]: Without dead ends: 47 [2018-12-24 13:59:44,802 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 13:59:44,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-12-24 13:59:44,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 25. [2018-12-24 13:59:44,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-24 13:59:44,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 80 transitions. [2018-12-24 13:59:44,811 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 80 transitions. Word has length 3 [2018-12-24 13:59:44,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:44,811 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 80 transitions. [2018-12-24 13:59:44,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 13:59:44,812 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 80 transitions. [2018-12-24 13:59:44,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:44,812 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:44,812 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:44,813 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:44,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:44,813 INFO L82 PathProgramCache]: Analyzing trace with hash 941528, now seen corresponding path program 1 times [2018-12-24 13:59:44,813 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:44,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:44,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:44,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:44,815 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:44,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:44,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:44,883 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:44,883 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 13:59:44,883 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [27] [2018-12-24 13:59:44,885 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:44,885 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:44,891 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:44,892 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 13:59:44,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:44,892 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:44,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:44,893 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 13:59:44,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:44,905 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:44,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:44,942 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 13:59:44,949 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 13:59:44,954 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,957 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 13:59:44,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,970 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,971 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 13:59:44,994 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,995 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,997 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,999 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,000 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 13:59:45,019 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 13:59:45,020 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,087 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,120 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,141 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,157 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,171 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,202 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 13:59:45,239 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,242 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,244 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 13:59:45,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,284 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,285 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,287 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 13:59:45,336 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,338 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,339 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,342 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,343 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,344 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 13:59:45,345 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,363 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,382 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,401 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,440 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:45,440 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 13:59:45,486 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,487 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 13:59:45,488 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,520 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:45,520 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 13:59:45,571 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,573 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,575 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,577 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,579 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,580 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,582 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,583 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2018-12-24 13:59:45,585 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,650 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:45,651 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2018-12-24 13:59:45,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:45,669 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:45,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:45,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:45,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 13:59:45,716 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:45,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 13:59:45,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 13:59:45,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 13:59:45,717 INFO L87 Difference]: Start difference. First operand 25 states and 80 transitions. Second operand 8 states. [2018-12-24 13:59:46,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:46,393 INFO L93 Difference]: Finished difference Result 61 states and 138 transitions. [2018-12-24 13:59:46,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 13:59:46,393 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 13:59:46,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:46,395 INFO L225 Difference]: With dead ends: 61 [2018-12-24 13:59:46,395 INFO L226 Difference]: Without dead ends: 57 [2018-12-24 13:59:46,396 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 13:59:46,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-24 13:59:46,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 29. [2018-12-24 13:59:46,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-24 13:59:46,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 98 transitions. [2018-12-24 13:59:46,406 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 98 transitions. Word has length 4 [2018-12-24 13:59:46,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:46,406 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 98 transitions. [2018-12-24 13:59:46,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 13:59:46,406 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 98 transitions. [2018-12-24 13:59:46,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:46,407 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:46,407 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:46,408 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:46,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:46,408 INFO L82 PathProgramCache]: Analyzing trace with hash 941590, now seen corresponding path program 1 times [2018-12-24 13:59:46,408 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:46,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:46,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:46,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:46,409 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:46,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:46,513 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:46,513 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 13:59:46,513 INFO L207 CegarAbsIntRunner]: [0], [18], [24], [27] [2018-12-24 13:59:46,515 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:46,515 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:46,521 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:46,521 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 13:59:46,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:46,522 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:46,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:46,522 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 13:59:46,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:46,533 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:46,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:46,571 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,572 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 13:59:46,621 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,622 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,624 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 13:59:46,710 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,711 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,712 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,714 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,715 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 13:59:46,776 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,777 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,779 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,780 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,789 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,790 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 13:59:46,862 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,863 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,864 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,865 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,866 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,867 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,869 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,870 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,871 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 13:59:46,872 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:46,919 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:46,945 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:46,971 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,000 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,042 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 13:59:47,049 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 13:59:47,055 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 13:59:47,060 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 13:59:47,063 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 13:59:47,068 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 13:59:47,069 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,125 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,159 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,189 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,213 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,230 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,298 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:47,299 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2018-12-24 13:59:47,422 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,423 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 13:59:47,424 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,477 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:47,478 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 13:59:47,511 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,514 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,518 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,518 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,519 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,520 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 13:59:47,521 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2018-12-24 13:59:47,522 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,574 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:47,574 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2018-12-24 13:59:47,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:47,597 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:47,641 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:47,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 13:59:47,641 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:47,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 13:59:47,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 13:59:47,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 13:59:47,643 INFO L87 Difference]: Start difference. First operand 29 states and 98 transitions. Second operand 8 states. [2018-12-24 13:59:48,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:48,187 INFO L93 Difference]: Finished difference Result 59 states and 140 transitions. [2018-12-24 13:59:48,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 13:59:48,187 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 13:59:48,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:48,189 INFO L225 Difference]: With dead ends: 59 [2018-12-24 13:59:48,189 INFO L226 Difference]: Without dead ends: 55 [2018-12-24 13:59:48,189 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 13:59:48,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-24 13:59:48,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-12-24 13:59:48,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-24 13:59:48,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 110 transitions. [2018-12-24 13:59:48,199 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 110 transitions. Word has length 4 [2018-12-24 13:59:48,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:48,199 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 110 transitions. [2018-12-24 13:59:48,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 13:59:48,200 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 110 transitions. [2018-12-24 13:59:48,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:48,200 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:48,200 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:48,200 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:48,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:48,201 INFO L82 PathProgramCache]: Analyzing trace with hash 941156, now seen corresponding path program 1 times [2018-12-24 13:59:48,201 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:48,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:48,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:48,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:48,202 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:48,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:48,357 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:48,357 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 13:59:48,357 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [27] [2018-12-24 13:59:48,360 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:48,360 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:48,364 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:48,365 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 13:59:48,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:48,365 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:48,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:48,366 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 13:59:48,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:48,377 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:48,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:48,402 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 13:59:48,407 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 13:59:48,414 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,417 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,418 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 13:59:48,422 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,423 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,424 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 13:59:48,434 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,437 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,440 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,442 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,443 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 13:59:48,454 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 13:59:48,454 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:48,485 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:48,508 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:48,526 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:48,541 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:48,555 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:48,586 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,587 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 13:59:48,628 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,630 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,634 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 13:59:48,704 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,705 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,707 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,708 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,709 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 13:59:48,760 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,761 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,762 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,763 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,764 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,765 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,766 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 13:59:48,767 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:48,785 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:48,800 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:48,817 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:48,851 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:48,852 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 13:59:48,912 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,913 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 13:59:48,914 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:48,945 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:48,946 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 13:59:48,996 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,998 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,000 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,002 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,004 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,006 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 13:59:49,007 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 81 [2018-12-24 13:59:49,009 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:49,043 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:49,043 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:42 [2018-12-24 13:59:49,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:49,061 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:49,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:49,105 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:49,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 13:59:49,105 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:49,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 13:59:49,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 13:59:49,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 13:59:49,106 INFO L87 Difference]: Start difference. First operand 30 states and 110 transitions. Second operand 8 states. [2018-12-24 13:59:49,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:49,514 INFO L93 Difference]: Finished difference Result 57 states and 144 transitions. [2018-12-24 13:59:49,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 13:59:49,514 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 13:59:49,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:49,515 INFO L225 Difference]: With dead ends: 57 [2018-12-24 13:59:49,516 INFO L226 Difference]: Without dead ends: 55 [2018-12-24 13:59:49,516 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 13:59:49,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-24 13:59:49,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-12-24 13:59:49,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-24 13:59:49,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 109 transitions. [2018-12-24 13:59:49,525 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 109 transitions. Word has length 4 [2018-12-24 13:59:49,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:49,526 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 109 transitions. [2018-12-24 13:59:49,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 13:59:49,526 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 109 transitions. [2018-12-24 13:59:49,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:49,527 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:49,527 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:49,527 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:49,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:49,527 INFO L82 PathProgramCache]: Analyzing trace with hash 941280, now seen corresponding path program 1 times [2018-12-24 13:59:49,527 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:49,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:49,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:49,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:49,529 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:49,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:49,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:49,648 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:49,649 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 13:59:49,649 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [27] [2018-12-24 13:59:49,650 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:49,650 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:49,656 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:49,657 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 13:59:49,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:49,657 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:49,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:49,657 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:49,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:49,667 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:49,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:49,694 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,695 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 13:59:49,728 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,729 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,730 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 13:59:49,772 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,774 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,776 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,777 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,778 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 13:59:49,854 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,855 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,856 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,857 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,859 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,861 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 13:59:49,862 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:49,878 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:49,895 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:49,913 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:49,938 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 13:59:49,942 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 13:59:49,946 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 13:59:49,953 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 13:59:49,971 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 13:59:49,980 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 13:59:49,981 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:50,377 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:50,457 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:50,474 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:50,486 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:50,496 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:50,530 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:50,531 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 13:59:50,578 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:50,579 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 13:59:50,579 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:50,611 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:50,612 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 13:59:50,646 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:50,647 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:50,647 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:50,648 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:50,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:50,650 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:50,651 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:50,653 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 13:59:50,653 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:50,686 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:50,687 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2018-12-24 13:59:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:50,706 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:50,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:50,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:50,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 13:59:50,767 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:50,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 13:59:50,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 13:59:50,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-12-24 13:59:50,768 INFO L87 Difference]: Start difference. First operand 30 states and 109 transitions. Second operand 8 states. [2018-12-24 13:59:50,957 WARN L181 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2018-12-24 13:59:51,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:51,410 INFO L93 Difference]: Finished difference Result 57 states and 158 transitions. [2018-12-24 13:59:51,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 13:59:51,411 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 13:59:51,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:51,412 INFO L225 Difference]: With dead ends: 57 [2018-12-24 13:59:51,412 INFO L226 Difference]: Without dead ends: 53 [2018-12-24 13:59:51,413 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-12-24 13:59:51,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-24 13:59:51,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 31. [2018-12-24 13:59:51,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-24 13:59:51,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 126 transitions. [2018-12-24 13:59:51,423 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 126 transitions. Word has length 4 [2018-12-24 13:59:51,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:51,423 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 126 transitions. [2018-12-24 13:59:51,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 13:59:51,423 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 126 transitions. [2018-12-24 13:59:51,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:51,424 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:51,424 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:51,424 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:51,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:51,425 INFO L82 PathProgramCache]: Analyzing trace with hash 929872, now seen corresponding path program 1 times [2018-12-24 13:59:51,425 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:51,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:51,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:51,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:51,426 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:51,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:51,526 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:51,526 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 13:59:51,527 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [27] [2018-12-24 13:59:51,528 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:51,528 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:51,532 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:51,533 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 13:59:51,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:51,533 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:51,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:51,533 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:51,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:51,546 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:51,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:51,582 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,583 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 13:59:51,615 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,616 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,617 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 13:59:51,652 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,653 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,654 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,656 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,657 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 13:59:51,700 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,700 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,701 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,703 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,704 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,705 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,706 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 13:59:51,707 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:51,726 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:51,742 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:51,760 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:51,784 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 13:59:51,788 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 13:59:51,792 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 13:59:51,795 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 13:59:51,799 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 13:59:51,808 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 13:59:51,809 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:51,835 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:51,855 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:51,872 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:51,886 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:51,899 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:51,934 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:51,934 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2018-12-24 13:59:51,979 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,980 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 13:59:51,981 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:52,015 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:52,016 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 13:59:52,036 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,037 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,039 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,041 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,042 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,043 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 13:59:52,044 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:52,076 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:52,077 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:38 [2018-12-24 13:59:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:52,095 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:52,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:52,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 13:59:52,128 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:52,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 13:59:52,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 13:59:52,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2018-12-24 13:59:52,129 INFO L87 Difference]: Start difference. First operand 31 states and 126 transitions. Second operand 8 states. [2018-12-24 13:59:52,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:52,608 INFO L93 Difference]: Finished difference Result 73 states and 228 transitions. [2018-12-24 13:59:52,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 13:59:52,609 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 13:59:52,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:52,610 INFO L225 Difference]: With dead ends: 73 [2018-12-24 13:59:52,610 INFO L226 Difference]: Without dead ends: 71 [2018-12-24 13:59:52,611 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2018-12-24 13:59:52,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-12-24 13:59:52,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 40. [2018-12-24 13:59:52,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-12-24 13:59:52,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 173 transitions. [2018-12-24 13:59:52,624 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 173 transitions. Word has length 4 [2018-12-24 13:59:52,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:52,624 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 173 transitions. [2018-12-24 13:59:52,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 13:59:52,625 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 173 transitions. [2018-12-24 13:59:52,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:52,625 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:52,626 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:52,626 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:52,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:52,626 INFO L82 PathProgramCache]: Analyzing trace with hash 930184, now seen corresponding path program 1 times [2018-12-24 13:59:52,626 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:52,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:52,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:52,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:52,628 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:52,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:52,716 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:52,716 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 13:59:52,716 INFO L207 CegarAbsIntRunner]: [0], [6], [28], [29] [2018-12-24 13:59:52,717 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:52,717 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:52,726 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:52,726 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 13:59:52,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:52,726 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:52,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:52,727 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 13:59:52,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:52,735 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:52,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:52,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:52,778 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 13:59:52,781 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 13:59:52,793 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,800 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,801 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 13:59:52,804 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,808 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,810 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,811 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 13:59:52,818 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,829 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,831 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,832 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 13:59:52,849 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 13:59:52,850 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:52,885 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:52,910 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:52,931 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:52,947 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:52,962 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:52,993 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,995 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 13:59:53,030 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,031 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,033 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 13:59:53,078 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,080 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,083 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 13:59:53,133 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,134 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,135 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,137 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,138 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,139 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,140 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 13:59:53,141 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:53,160 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:53,179 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:53,198 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:53,237 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:53,238 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2018-12-24 13:59:53,334 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,335 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 13:59:53,336 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:53,377 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:53,377 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:50 [2018-12-24 13:59:53,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:53,395 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:53,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:53,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:53,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 13:59:53,427 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:53,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 13:59:53,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 13:59:53,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 13:59:53,429 INFO L87 Difference]: Start difference. First operand 40 states and 173 transitions. Second operand 6 states. [2018-12-24 13:59:53,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:53,667 INFO L93 Difference]: Finished difference Result 56 states and 192 transitions. [2018-12-24 13:59:53,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 13:59:53,668 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2018-12-24 13:59:53,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:53,670 INFO L225 Difference]: With dead ends: 56 [2018-12-24 13:59:53,670 INFO L226 Difference]: Without dead ends: 55 [2018-12-24 13:59:53,671 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 13:59:53,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-24 13:59:53,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2018-12-24 13:59:53,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-24 13:59:53,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 180 transitions. [2018-12-24 13:59:53,683 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 180 transitions. Word has length 4 [2018-12-24 13:59:53,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:53,684 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 180 transitions. [2018-12-24 13:59:53,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 13:59:53,684 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 180 transitions. [2018-12-24 13:59:53,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:53,685 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:53,685 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:53,685 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:53,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:53,686 INFO L82 PathProgramCache]: Analyzing trace with hash 945434, now seen corresponding path program 1 times [2018-12-24 13:59:53,686 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:53,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:53,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:53,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:53,687 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:53,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:53,783 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:53,783 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 13:59:53,784 INFO L207 CegarAbsIntRunner]: [0], [22], [24], [27] [2018-12-24 13:59:53,787 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:53,787 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:53,791 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:53,792 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 13:59:53,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:53,792 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:53,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:53,792 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:53,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:53,813 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:53,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:53,851 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,852 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 13:59:53,895 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,897 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,898 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 13:59:53,974 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,976 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,979 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,981 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,982 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 13:59:54,033 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,036 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,040 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,041 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,042 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,043 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 13:59:54,166 WARN L181 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2018-12-24 13:59:54,178 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,179 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,180 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,182 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,183 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,185 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,186 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,188 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,189 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 13:59:54,190 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,240 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,270 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,306 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,339 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,398 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 13:59:54,401 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 13:59:54,404 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 13:59:54,407 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 13:59:54,411 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 13:59:54,433 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 13:59:54,433 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,487 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,508 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,524 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,537 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,550 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,596 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:54,596 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2018-12-24 13:59:54,642 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,643 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 13:59:54,643 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,715 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:54,716 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 13:59:54,790 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,813 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,835 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,856 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,877 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,904 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,951 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,951 INFO L303 Elim1Store]: Index analysis took 204 ms [2018-12-24 13:59:54,952 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 13:59:54,953 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:55,426 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:55,427 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2018-12-24 13:59:55,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:55,453 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:55,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:55,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 13:59:55,491 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:55,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 13:59:55,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 13:59:55,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-12-24 13:59:55,491 INFO L87 Difference]: Start difference. First operand 42 states and 180 transitions. Second operand 8 states. [2018-12-24 13:59:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:55,959 INFO L93 Difference]: Finished difference Result 96 states and 313 transitions. [2018-12-24 13:59:55,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 13:59:55,959 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 13:59:55,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:55,961 INFO L225 Difference]: With dead ends: 96 [2018-12-24 13:59:55,961 INFO L226 Difference]: Without dead ends: 93 [2018-12-24 13:59:55,961 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2018-12-24 13:59:55,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-12-24 13:59:55,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 55. [2018-12-24 13:59:55,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-24 13:59:55,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 250 transitions. [2018-12-24 13:59:55,974 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 250 transitions. Word has length 4 [2018-12-24 13:59:55,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:55,975 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 250 transitions. [2018-12-24 13:59:55,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 13:59:55,975 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 250 transitions. [2018-12-24 13:59:55,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:55,976 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:55,976 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:55,976 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:55,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:55,976 INFO L82 PathProgramCache]: Analyzing trace with hash 945000, now seen corresponding path program 1 times [2018-12-24 13:59:55,977 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:55,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:55,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:55,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:55,978 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:56,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:56,037 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:56,037 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:56,037 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 13:59:56,038 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [27] [2018-12-24 13:59:56,040 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:56,040 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:56,044 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:56,044 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 13:59:56,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:56,045 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:56,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:56,045 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:56,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:56,058 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:56,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:56,088 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 13:59:56,100 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 13:59:56,138 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,162 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,162 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 13:59:56,172 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,176 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,176 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 13:59:56,180 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,182 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,183 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,184 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,185 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 13:59:56,195 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 13:59:56,196 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,224 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,247 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,266 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,280 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,295 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,359 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 13:59:56,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,395 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 13:59:56,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,433 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,434 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,435 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 13:59:56,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,482 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,483 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,484 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,485 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 13:59:56,486 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,502 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,518 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,534 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,568 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:56,568 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 13:59:56,607 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,608 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 13:59:56,609 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,640 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:56,641 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 13:59:56,662 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,663 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,664 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,665 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,666 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,667 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,668 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,670 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2018-12-24 13:59:56,671 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,708 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:56,709 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:38 [2018-12-24 13:59:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:56,735 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:56,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:56,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 13:59:56,782 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:56,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 13:59:56,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 13:59:56,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-24 13:59:56,783 INFO L87 Difference]: Start difference. First operand 55 states and 250 transitions. Second operand 8 states. [2018-12-24 13:59:57,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:57,252 INFO L93 Difference]: Finished difference Result 84 states and 299 transitions. [2018-12-24 13:59:57,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 13:59:57,253 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 13:59:57,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:57,254 INFO L225 Difference]: With dead ends: 84 [2018-12-24 13:59:57,255 INFO L226 Difference]: Without dead ends: 82 [2018-12-24 13:59:57,255 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2018-12-24 13:59:57,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-12-24 13:59:57,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 58. [2018-12-24 13:59:57,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-12-24 13:59:57,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 270 transitions. [2018-12-24 13:59:57,269 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 270 transitions. Word has length 4 [2018-12-24 13:59:57,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:57,270 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 270 transitions. [2018-12-24 13:59:57,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 13:59:57,270 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 270 transitions. [2018-12-24 13:59:57,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:57,271 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:57,271 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:57,271 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:57,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:57,271 INFO L82 PathProgramCache]: Analyzing trace with hash 946922, now seen corresponding path program 1 times [2018-12-24 13:59:57,271 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:57,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:57,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:57,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:57,272 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:57,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:57,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:57,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:57,428 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:57,428 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 13:59:57,429 INFO L207 CegarAbsIntRunner]: [0], [10], [24], [27] [2018-12-24 13:59:57,431 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:57,431 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:57,434 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:57,435 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 13:59:57,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:57,435 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:57,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:57,435 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:57,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:57,451 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:57,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:57,486 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 13:59:57,489 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 13:59:57,494 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,496 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,497 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 13:59:57,503 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,505 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,507 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,508 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 13:59:57,545 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,560 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,562 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,562 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 13:59:57,568 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,570 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,572 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,574 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,576 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,577 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 13:59:57,577 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:57,632 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:57,661 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:57,683 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:57,698 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:57,711 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:57,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,746 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 13:59:57,784 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,785 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,786 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 13:59:57,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,828 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,830 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,831 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,832 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 13:59:57,895 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,896 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,898 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,899 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,900 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,901 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,902 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 13:59:57,966 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,969 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,970 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,971 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,972 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,973 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,974 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,975 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 13:59:57,976 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,003 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,029 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,055 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,082 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,129 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:58,129 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2018-12-24 13:59:58,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,202 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 13:59:58,202 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,248 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:58,248 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 13:59:58,303 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,304 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,306 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,311 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,312 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,312 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,313 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,313 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 13:59:58,315 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 112 [2018-12-24 13:59:58,315 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,365 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:58,366 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2018-12-24 13:59:58,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:58,386 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:58,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:58,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:58,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 13:59:58,431 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:58,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 13:59:58,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 13:59:58,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 13:59:58,432 INFO L87 Difference]: Start difference. First operand 58 states and 270 transitions. Second operand 8 states. [2018-12-24 13:59:59,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:59,202 INFO L93 Difference]: Finished difference Result 91 states and 313 transitions. [2018-12-24 13:59:59,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 13:59:59,202 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 13:59:59,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:59,203 INFO L225 Difference]: With dead ends: 91 [2018-12-24 13:59:59,203 INFO L226 Difference]: Without dead ends: 89 [2018-12-24 13:59:59,204 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 13:59:59,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-12-24 13:59:59,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 59. [2018-12-24 13:59:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-24 13:59:59,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 277 transitions. [2018-12-24 13:59:59,217 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 277 transitions. Word has length 4 [2018-12-24 13:59:59,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:59,217 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 277 transitions. [2018-12-24 13:59:59,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 13:59:59,217 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 277 transitions. [2018-12-24 13:59:59,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:59,218 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:59,218 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:59,219 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:59,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:59,219 INFO L82 PathProgramCache]: Analyzing trace with hash 934028, now seen corresponding path program 1 times [2018-12-24 13:59:59,219 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:59,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:59,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:59,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:59,220 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:59,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:59,254 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:59,254 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 13:59:59,254 INFO L207 CegarAbsIntRunner]: [0], [10], [28], [29] [2018-12-24 13:59:59,256 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:59,256 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:59,267 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:59,267 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 13:59:59,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:59,268 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:59,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:59,268 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:59,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:59,277 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:59,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:59,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:59,287 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 13:59:59,294 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 13:59:59,302 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,304 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,304 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 13:59:59,343 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,345 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,347 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,348 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 13:59:59,354 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,358 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,360 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,361 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,361 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 13:59:59,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 13:59:59,374 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,624 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,646 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,699 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,713 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,726 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,749 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 13:59:59,764 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,766 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,767 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 13:59:59,798 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,799 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,801 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,802 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,803 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 13:59:59,845 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,846 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,847 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,848 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,849 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,851 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,852 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 13:59:59,853 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,868 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,882 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,898 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,930 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:59,930 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:64, output treesize:67 [2018-12-24 13:59:59,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,966 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 13:59:59,967 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:00:00,061 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:00:00,061 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:72, output treesize:92 [2018-12-24 14:00:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:00,109 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:00,147 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-24 14:00:00,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2018-12-24 14:00:00,147 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:00:00,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 14:00:00,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 14:00:00,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 14:00:00,148 INFO L87 Difference]: Start difference. First operand 59 states and 277 transitions. Second operand 4 states. [2018-12-24 14:00:00,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:00,270 INFO L93 Difference]: Finished difference Result 90 states and 454 transitions. [2018-12-24 14:00:00,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-24 14:00:00,270 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-12-24 14:00:00,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:00,272 INFO L225 Difference]: With dead ends: 90 [2018-12-24 14:00:00,272 INFO L226 Difference]: Without dead ends: 89 [2018-12-24 14:00:00,273 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 14:00:00,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-12-24 14:00:00,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2018-12-24 14:00:00,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-12-24 14:00:00,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 449 transitions. [2018-12-24 14:00:00,290 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 449 transitions. Word has length 4 [2018-12-24 14:00:00,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:00,290 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 449 transitions. [2018-12-24 14:00:00,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 14:00:00,291 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 449 transitions. [2018-12-24 14:00:00,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:00:00,292 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:00,292 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:00:00,292 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:00,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:00,292 INFO L82 PathProgramCache]: Analyzing trace with hash 933592, now seen corresponding path program 1 times [2018-12-24 14:00:00,293 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:00,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:00,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:00,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:00,294 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:00,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:00,393 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:00,393 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:00:00,393 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [27] [2018-12-24 14:00:00,394 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:00,394 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:00,397 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:00,398 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:00,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:00,398 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:00,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:00,398 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:00,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:00,411 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:00,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:00,447 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,448 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:00:00,482 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,483 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,484 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:00:00,524 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,525 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,527 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,529 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,530 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:00:00,583 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,585 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,589 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,593 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,594 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:00:00,595 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:00,618 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:00,641 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:00,665 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:00,701 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:00,705 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:00:00,709 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:00:00,713 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:00:00,717 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:00:00,727 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:00:00,728 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:00,759 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:00,782 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:00,802 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:00,815 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:00,829 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:00,867 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:00,868 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 14:00:00,966 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,968 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:00:00,968 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,085 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:01,086 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 14:00:01,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,117 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,122 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,123 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,125 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 14:00:01,126 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,162 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:01,163 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2018-12-24 14:00:01,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:01,181 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:01,224 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:01,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:00:01,224 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:01,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:01,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:01,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:01,225 INFO L87 Difference]: Start difference. First operand 83 states and 449 transitions. Second operand 8 states. [2018-12-24 14:00:01,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:01,671 INFO L93 Difference]: Finished difference Result 121 states and 532 transitions. [2018-12-24 14:00:01,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:00:01,672 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:00:01,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:01,674 INFO L225 Difference]: With dead ends: 121 [2018-12-24 14:00:01,675 INFO L226 Difference]: Without dead ends: 119 [2018-12-24 14:00:01,676 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:00:01,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-12-24 14:00:01,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 91. [2018-12-24 14:00:01,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-12-24 14:00:01,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 493 transitions. [2018-12-24 14:00:01,707 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 493 transitions. Word has length 4 [2018-12-24 14:00:01,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:01,707 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 493 transitions. [2018-12-24 14:00:01,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:01,707 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 493 transitions. [2018-12-24 14:00:01,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:00:01,708 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:01,708 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:00:01,709 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:01,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:01,709 INFO L82 PathProgramCache]: Analyzing trace with hash 937872, now seen corresponding path program 1 times [2018-12-24 14:00:01,709 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:01,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:01,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:01,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:01,712 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:01,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:01,879 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:01,879 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:00:01,879 INFO L207 CegarAbsIntRunner]: [0], [14], [28], [29] [2018-12-24 14:00:01,882 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:01,882 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:01,890 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:01,890 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 14:00:01,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:01,890 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:01,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:01,891 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:01,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:01,909 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:01,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:01,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:01,946 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:01,980 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:00:02,049 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,071 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,072 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:00:02,133 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,160 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,171 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,172 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:00:02,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,261 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,278 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,301 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,302 INFO L303 Elim1Store]: Index analysis took 128 ms [2018-12-24 14:00:02,303 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:00:02,450 INFO L303 Elim1Store]: Index analysis took 145 ms [2018-12-24 14:00:02,451 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:00:02,451 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,568 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,594 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,613 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,628 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,645 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,673 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:00:02,693 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,697 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,698 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:00:02,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,746 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,755 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,757 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,758 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:00:02,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,808 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,810 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,811 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,812 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,814 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,815 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:00:02,815 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,838 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,853 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,869 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,900 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:02,900 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:64, output treesize:67 [2018-12-24 14:00:02,938 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,939 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2018-12-24 14:00:02,940 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,965 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:02,966 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:72, output treesize:46 [2018-12-24 14:00:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:03,006 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:03,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:03,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:03,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:00:03,035 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:03,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:00:03,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:00:03,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:00:03,036 INFO L87 Difference]: Start difference. First operand 91 states and 493 transitions. Second operand 6 states. [2018-12-24 14:00:03,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:03,301 INFO L93 Difference]: Finished difference Result 110 states and 511 transitions. [2018-12-24 14:00:03,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:00:03,301 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2018-12-24 14:00:03,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:03,303 INFO L225 Difference]: With dead ends: 110 [2018-12-24 14:00:03,303 INFO L226 Difference]: Without dead ends: 109 [2018-12-24 14:00:03,304 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:00:03,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-12-24 14:00:03,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 91. [2018-12-24 14:00:03,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-12-24 14:00:03,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 493 transitions. [2018-12-24 14:00:03,317 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 493 transitions. Word has length 4 [2018-12-24 14:00:03,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:03,317 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 493 transitions. [2018-12-24 14:00:03,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:00:03,317 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 493 transitions. [2018-12-24 14:00:03,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:03,318 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:03,318 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-12-24 14:00:03,318 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:03,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:03,318 INFO L82 PathProgramCache]: Analyzing trace with hash 29182900, now seen corresponding path program 2 times [2018-12-24 14:00:03,318 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:03,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:03,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:03,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:03,319 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:03,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:03,392 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:03,392 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:00:03,392 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:00:03,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:03,393 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 14:00:03,404 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:00:03,404 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:00:03,449 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:00:03,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:00:03,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:03,501 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:03,503 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:00:03,506 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,506 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,507 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:00:03,510 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,512 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,513 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,514 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:00:03,529 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,531 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,532 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,532 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:00:03,537 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,538 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,538 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,539 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,541 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,541 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:00:03,542 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:03,583 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:03,661 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:03,681 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:03,695 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:03,707 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:03,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,742 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:00:03,783 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,784 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,785 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:00:03,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,828 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,829 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,830 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,830 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:00:03,882 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,883 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,884 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,885 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,887 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,888 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:00:03,955 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,959 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,960 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,961 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,962 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,963 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,964 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:00:03,965 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:03,991 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,017 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,044 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,071 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,118 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:04,119 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:92, output treesize:91 [2018-12-24 14:00:04,138 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,139 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:00:04,140 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,185 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:04,185 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:00:04,204 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,205 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,206 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,209 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,211 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,212 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,213 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 103 [2018-12-24 14:00:04,214 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,265 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:04,265 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:71 [2018-12-24 14:00:04,325 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,348 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,370 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,416 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,437 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,463 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,487 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,487 INFO L303 Elim1Store]: Index analysis took 201 ms [2018-12-24 14:00:04,488 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:00:04,489 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:05,095 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:05,095 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:57 [2018-12-24 14:00:05,326 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2018-12-24 14:00:05,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:05,327 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:05,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:05,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:00:05,833 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:05,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:00:05,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:00:05,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:00:05,834 INFO L87 Difference]: Start difference. First operand 91 states and 493 transitions. Second operand 10 states. [2018-12-24 14:00:07,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:07,236 INFO L93 Difference]: Finished difference Result 133 states and 606 transitions. [2018-12-24 14:00:07,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:00:07,237 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:00:07,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:07,239 INFO L225 Difference]: With dead ends: 133 [2018-12-24 14:00:07,239 INFO L226 Difference]: Without dead ends: 128 [2018-12-24 14:00:07,240 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:00:07,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-12-24 14:00:07,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 95. [2018-12-24 14:00:07,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-12-24 14:00:07,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 538 transitions. [2018-12-24 14:00:07,258 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 538 transitions. Word has length 5 [2018-12-24 14:00:07,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:07,258 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 538 transitions. [2018-12-24 14:00:07,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:00:07,258 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 538 transitions. [2018-12-24 14:00:07,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:07,259 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:07,259 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:07,259 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:07,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:07,260 INFO L82 PathProgramCache]: Analyzing trace with hash 29172052, now seen corresponding path program 1 times [2018-12-24 14:00:07,260 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:07,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:07,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:00:07,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:07,261 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:07,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:07,382 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:07,383 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:00:07,383 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [28], [29] [2018-12-24 14:00:07,384 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:07,384 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:07,387 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:07,388 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:07,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:07,388 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:07,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:07,388 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:07,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:07,400 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:07,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:07,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:07,428 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:00:07,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,431 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,432 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:00:07,436 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,437 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,439 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:00:07,443 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,444 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,446 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,447 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,448 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:00:07,456 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:00:07,457 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,487 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,510 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,538 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,557 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,575 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,609 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,610 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:00:07,658 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,660 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,660 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:00:07,715 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,717 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,719 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,724 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:00:07,794 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,800 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,802 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,804 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,806 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,806 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:00:07,807 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,831 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,855 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,880 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,920 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:07,920 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 14:00:07,962 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,963 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:00:07,963 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,991 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:07,991 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 14:00:08,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,013 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,014 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,015 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,017 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,019 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 14:00:08,020 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:08,054 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:08,055 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2018-12-24 14:00:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:08,111 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:08,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:08,174 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:08,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:00:08,175 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:08,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:08,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:08,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:08,175 INFO L87 Difference]: Start difference. First operand 95 states and 538 transitions. Second operand 8 states. [2018-12-24 14:00:08,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:08,513 INFO L93 Difference]: Finished difference Result 125 states and 622 transitions. [2018-12-24 14:00:08,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:00:08,514 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:00:08,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:08,516 INFO L225 Difference]: With dead ends: 125 [2018-12-24 14:00:08,516 INFO L226 Difference]: Without dead ends: 124 [2018-12-24 14:00:08,517 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:00:08,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-12-24 14:00:08,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 102. [2018-12-24 14:00:08,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-12-24 14:00:08,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 589 transitions. [2018-12-24 14:00:08,535 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 589 transitions. Word has length 5 [2018-12-24 14:00:08,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:08,535 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 589 transitions. [2018-12-24 14:00:08,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:08,535 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 589 transitions. [2018-12-24 14:00:08,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:08,536 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:08,536 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:08,536 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:08,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:08,537 INFO L82 PathProgramCache]: Analyzing trace with hash 29187302, now seen corresponding path program 1 times [2018-12-24 14:00:08,537 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:08,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:08,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:08,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:08,538 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:08,692 WARN L181 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2018-12-24 14:00:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:08,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:08,759 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:08,759 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:00:08,760 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [24], [27] [2018-12-24 14:00:08,763 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:08,763 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:08,766 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:08,766 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:00:08,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:08,766 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:08,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:08,767 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:08,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:08,778 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:08,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:08,811 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,812 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:00:08,848 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,849 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,850 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:00:08,894 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,895 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,897 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,898 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,899 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:00:08,950 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,951 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,953 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,954 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,955 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,957 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:00:09,023 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,024 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,025 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,027 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,028 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,029 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,030 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,031 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,032 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:00:09,033 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,059 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,105 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,133 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,161 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,198 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:09,201 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:00:09,204 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:00:09,206 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:00:09,209 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:00:09,214 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:00:09,214 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,250 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,271 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,287 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,301 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,313 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,360 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:09,360 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:00:09,395 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,396 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:00:09,396 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,439 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:09,439 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:00:09,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,474 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,475 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,476 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,477 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,480 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 105 [2018-12-24 14:00:09,481 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,527 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:09,527 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2018-12-24 14:00:09,555 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,556 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,556 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,557 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,560 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,561 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,562 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,563 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,564 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,565 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,566 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:09,567 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,568 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2018-12-24 14:00:09,569 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,620 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:09,620 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2018-12-24 14:00:09,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:09,645 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:09,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:09,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:00:09,718 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:09,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:00:09,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:00:09,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:00:09,719 INFO L87 Difference]: Start difference. First operand 102 states and 589 transitions. Second operand 10 states. [2018-12-24 14:00:09,866 WARN L181 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2018-12-24 14:00:11,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:11,193 INFO L93 Difference]: Finished difference Result 149 states and 665 transitions. [2018-12-24 14:00:11,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:00:11,194 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:00:11,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:11,196 INFO L225 Difference]: With dead ends: 149 [2018-12-24 14:00:11,196 INFO L226 Difference]: Without dead ends: 145 [2018-12-24 14:00:11,197 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:00:11,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-12-24 14:00:11,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 105. [2018-12-24 14:00:11,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-12-24 14:00:11,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 605 transitions. [2018-12-24 14:00:11,218 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 605 transitions. Word has length 5 [2018-12-24 14:00:11,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:11,218 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 605 transitions. [2018-12-24 14:00:11,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:00:11,218 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 605 transitions. [2018-12-24 14:00:11,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:11,219 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:11,219 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:11,220 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:11,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:11,220 INFO L82 PathProgramCache]: Analyzing trace with hash 29186868, now seen corresponding path program 1 times [2018-12-24 14:00:11,220 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:11,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:11,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:11,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:11,221 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:11,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:11,324 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:11,324 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:00:11,324 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [22], [27] [2018-12-24 14:00:11,326 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:11,326 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:11,330 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:11,330 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:00:11,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:11,330 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:11,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:11,331 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:11,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:11,344 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:11,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:11,370 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:11,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:00:11,379 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,381 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:00:11,384 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,385 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,386 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,386 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:00:11,390 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,391 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,395 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:00:11,405 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:00:11,406 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:11,439 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:11,463 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:11,482 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:11,497 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:11,511 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:11,541 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,542 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:00:11,585 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,586 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,587 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:00:11,623 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,625 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,626 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,627 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,628 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:00:11,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,674 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,675 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,676 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,677 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,678 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:00:11,678 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:11,694 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:11,710 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:11,726 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:11,759 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:11,759 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2018-12-24 14:00:11,816 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,817 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:00:11,817 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:11,845 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:11,845 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2018-12-24 14:00:11,870 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,871 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,871 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,872 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,873 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,874 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,875 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,876 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2018-12-24 14:00:11,877 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:11,908 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:11,909 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:40 [2018-12-24 14:00:11,932 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,933 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,934 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,934 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,935 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,937 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,938 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,939 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,940 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,940 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:11,941 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:11,942 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2018-12-24 14:00:11,943 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:11,978 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:11,978 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:34 [2018-12-24 14:00:11,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:11,997 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:12,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:12,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:00:12,050 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:12,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:00:12,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:00:12,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:00:12,051 INFO L87 Difference]: Start difference. First operand 105 states and 605 transitions. Second operand 10 states. [2018-12-24 14:00:12,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:12,601 INFO L93 Difference]: Finished difference Result 138 states and 662 transitions. [2018-12-24 14:00:12,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:00:12,602 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:00:12,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:12,604 INFO L225 Difference]: With dead ends: 138 [2018-12-24 14:00:12,604 INFO L226 Difference]: Without dead ends: 136 [2018-12-24 14:00:12,605 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:00:12,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-12-24 14:00:12,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2018-12-24 14:00:12,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-12-24 14:00:12,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 598 transitions. [2018-12-24 14:00:12,625 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 598 transitions. Word has length 5 [2018-12-24 14:00:12,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:12,625 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 598 transitions. [2018-12-24 14:00:12,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:00:12,625 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 598 transitions. [2018-12-24 14:00:12,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:12,626 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:12,626 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:12,626 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:12,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:12,627 INFO L82 PathProgramCache]: Analyzing trace with hash 29188666, now seen corresponding path program 1 times [2018-12-24 14:00:12,627 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:12,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:12,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:12,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:12,628 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:12,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:12,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:12,774 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:12,774 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:00:12,775 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [24], [27] [2018-12-24 14:00:12,775 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:12,775 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:12,780 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:12,780 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:00:12,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:12,780 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:12,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:12,781 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:12,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:12,792 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:12,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:12,823 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:12,824 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:00:12,866 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:12,867 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:12,868 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:00:12,916 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:12,918 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:12,919 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:12,921 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:12,922 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:00:12,979 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:12,981 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:12,982 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:12,983 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:12,984 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:12,985 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:12,986 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:00:13,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,063 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,064 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,065 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,067 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,068 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,069 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:00:13,069 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:13,097 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:13,123 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:13,150 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:13,178 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:13,213 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:13,216 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:00:13,218 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:00:13,220 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:00:13,223 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:00:13,264 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:00:13,265 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:13,567 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:13,588 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:13,604 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:13,618 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:13,630 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:13,677 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:13,677 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2018-12-24 14:00:13,700 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,700 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:00:13,701 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:13,743 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:13,744 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:00:13,771 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,772 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,772 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,773 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,774 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,775 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,776 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:13,777 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2018-12-24 14:00:13,778 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:13,824 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:13,824 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2018-12-24 14:00:13,845 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,846 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,846 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,847 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,848 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,849 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,850 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,852 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,853 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,854 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,855 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,856 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 115 [2018-12-24 14:00:13,857 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:13,917 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:13,917 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:51 [2018-12-24 14:00:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:13,935 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:13,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:13,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:00:13,978 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:13,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:00:13,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:00:13,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:00:13,979 INFO L87 Difference]: Start difference. First operand 104 states and 598 transitions. Second operand 10 states. [2018-12-24 14:00:14,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:14,561 INFO L93 Difference]: Finished difference Result 152 states and 738 transitions. [2018-12-24 14:00:14,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:00:14,564 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:00:14,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:14,566 INFO L225 Difference]: With dead ends: 152 [2018-12-24 14:00:14,566 INFO L226 Difference]: Without dead ends: 151 [2018-12-24 14:00:14,567 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:00:14,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-12-24 14:00:14,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 106. [2018-12-24 14:00:14,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-12-24 14:00:14,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 612 transitions. [2018-12-24 14:00:14,588 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 612 transitions. Word has length 5 [2018-12-24 14:00:14,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:14,588 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 612 transitions. [2018-12-24 14:00:14,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:00:14,588 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 612 transitions. [2018-12-24 14:00:14,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:14,589 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:14,589 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:14,589 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:14,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:14,590 INFO L82 PathProgramCache]: Analyzing trace with hash 29188790, now seen corresponding path program 1 times [2018-12-24 14:00:14,590 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:14,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:14,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:14,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:14,591 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:14,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:14,703 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:14,703 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:00:14,703 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [24], [27] [2018-12-24 14:00:14,704 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:14,704 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:14,707 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:14,707 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:00:14,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:14,707 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:14,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:14,708 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:14,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:14,715 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:14,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:14,763 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,764 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:00:14,803 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,805 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,805 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:00:14,847 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,848 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,850 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,852 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,853 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:00:14,922 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,923 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,924 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,926 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,931 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,932 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:00:14,999 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,000 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,001 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,003 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,004 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,006 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,007 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,009 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,010 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:00:15,010 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:15,073 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:15,103 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:15,133 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:15,166 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:15,208 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:15,211 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:00:15,214 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:00:15,216 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:00:15,219 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:00:15,222 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:00:15,223 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:15,261 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:15,282 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:15,299 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:15,314 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:15,328 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:15,373 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:15,374 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:00:15,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,408 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:00:15,409 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:15,454 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:15,454 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:00:15,483 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,484 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,485 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,486 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,487 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,489 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,489 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:15,490 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2018-12-24 14:00:15,491 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:15,536 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:15,537 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:59 [2018-12-24 14:00:15,560 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,561 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,562 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,563 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,564 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,566 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,567 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,568 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,569 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,570 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:15,571 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 108 [2018-12-24 14:00:15,571 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:15,791 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:15,791 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:57 [2018-12-24 14:00:17,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:17,324 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:17,383 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:17,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:00:17,383 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:17,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:00:17,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:00:17,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:00:17,384 INFO L87 Difference]: Start difference. First operand 106 states and 612 transitions. Second operand 10 states. [2018-12-24 14:00:18,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:18,169 INFO L93 Difference]: Finished difference Result 141 states and 665 transitions. [2018-12-24 14:00:18,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:00:18,170 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:00:18,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:18,172 INFO L225 Difference]: With dead ends: 141 [2018-12-24 14:00:18,172 INFO L226 Difference]: Without dead ends: 140 [2018-12-24 14:00:18,173 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:00:18,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-12-24 14:00:18,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 107. [2018-12-24 14:00:18,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-12-24 14:00:18,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 619 transitions. [2018-12-24 14:00:18,196 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 619 transitions. Word has length 5 [2018-12-24 14:00:18,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:18,196 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 619 transitions. [2018-12-24 14:00:18,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:00:18,196 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 619 transitions. [2018-12-24 14:00:18,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:18,197 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:18,197 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:18,197 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:18,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:18,198 INFO L82 PathProgramCache]: Analyzing trace with hash 29175212, now seen corresponding path program 1 times [2018-12-24 14:00:18,198 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:18,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:18,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:18,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:18,199 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:18,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:18,321 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:18,321 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:00:18,321 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [27] [2018-12-24 14:00:18,324 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:18,324 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:18,326 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:18,326 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:00:18,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:18,327 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:18,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:18,327 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:18,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:18,337 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:18,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:18,361 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:18,363 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:00:18,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,367 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,368 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:00:18,371 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,373 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,374 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,375 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:00:18,398 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,400 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,402 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,404 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,405 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:00:18,415 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:00:18,416 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:18,447 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:18,471 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:18,490 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:18,505 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:18,518 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:18,548 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,549 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:00:18,583 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,584 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,585 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:00:18,618 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,619 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,620 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,621 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,622 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:00:18,667 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,668 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,670 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,672 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,674 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:00:18,674 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:18,691 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:18,707 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:18,723 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:18,756 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:18,757 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 14:00:18,795 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,796 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:00:18,796 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:18,824 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:18,824 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 14:00:18,843 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,844 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,845 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,845 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,846 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,846 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:18,847 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 81 [2018-12-24 14:00:18,848 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:18,886 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:18,887 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:42 [2018-12-24 14:00:18,910 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,911 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,913 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,914 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,915 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,916 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,917 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,918 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,920 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,921 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 90 [2018-12-24 14:00:18,921 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:18,952 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:18,952 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:38 [2018-12-24 14:00:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:18,970 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:19,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:19,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:00:19,017 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:19,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:00:19,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:00:19,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:00:19,018 INFO L87 Difference]: Start difference. First operand 107 states and 619 transitions. Second operand 10 states. [2018-12-24 14:00:19,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:19,620 INFO L93 Difference]: Finished difference Result 163 states and 816 transitions. [2018-12-24 14:00:19,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:00:19,621 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:00:19,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:19,623 INFO L225 Difference]: With dead ends: 163 [2018-12-24 14:00:19,627 INFO L226 Difference]: Without dead ends: 162 [2018-12-24 14:00:19,627 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:00:19,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-12-24 14:00:19,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 116. [2018-12-24 14:00:19,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-12-24 14:00:19,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 682 transitions. [2018-12-24 14:00:19,653 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 682 transitions. Word has length 5 [2018-12-24 14:00:19,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:19,653 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 682 transitions. [2018-12-24 14:00:19,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:00:19,654 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 682 transitions. [2018-12-24 14:00:19,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:19,654 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:19,654 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:19,655 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:19,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:19,655 INFO L82 PathProgramCache]: Analyzing trace with hash 29179614, now seen corresponding path program 1 times [2018-12-24 14:00:19,655 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:19,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:19,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:19,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:19,656 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:19,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:19,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:19,744 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:19,744 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:00:19,744 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [24], [27] [2018-12-24 14:00:19,746 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:19,746 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:19,748 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:19,748 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:00:19,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:19,749 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:19,749 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:19,749 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:19,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:19,760 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:19,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:19,792 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,793 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:00:19,841 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,842 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,842 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:00:19,891 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,892 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,894 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,895 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,896 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:00:19,954 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,955 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,958 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,960 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,961 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,962 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:00:20,049 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,051 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,053 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,055 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,057 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,059 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,063 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,064 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:00:20,065 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,096 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,127 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,159 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,189 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,229 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:20,232 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:00:20,236 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:00:20,239 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:00:20,242 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:00:20,246 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:00:20,247 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,295 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,316 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,332 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,345 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,357 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,403 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:20,404 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:00:20,451 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,452 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:00:20,452 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,495 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:20,496 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:00:20,525 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,526 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,527 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,528 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,531 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,532 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,533 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,534 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:00:20,534 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,583 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:20,584 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2018-12-24 14:00:20,610 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,611 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,612 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,613 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,615 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,616 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,617 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,618 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,619 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,620 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,621 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,622 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:20,623 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,624 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2018-12-24 14:00:20,625 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,676 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:20,676 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2018-12-24 14:00:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:20,701 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:20,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:20,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:00:20,759 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:20,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:00:20,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:00:20,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:00:20,759 INFO L87 Difference]: Start difference. First operand 116 states and 682 transitions. Second operand 10 states. [2018-12-24 14:00:21,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:21,425 INFO L93 Difference]: Finished difference Result 163 states and 796 transitions. [2018-12-24 14:00:21,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:00:21,426 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:00:21,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:21,429 INFO L225 Difference]: With dead ends: 163 [2018-12-24 14:00:21,429 INFO L226 Difference]: Without dead ends: 160 [2018-12-24 14:00:21,430 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:00:21,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-12-24 14:00:21,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 122. [2018-12-24 14:00:21,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-12-24 14:00:21,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 724 transitions. [2018-12-24 14:00:21,454 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 724 transitions. Word has length 5 [2018-12-24 14:00:21,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:21,454 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 724 transitions. [2018-12-24 14:00:21,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:00:21,454 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 724 transitions. [2018-12-24 14:00:21,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:21,455 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:21,455 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:21,455 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:21,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:21,456 INFO L82 PathProgramCache]: Analyzing trace with hash 29179180, now seen corresponding path program 1 times [2018-12-24 14:00:21,456 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:21,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:21,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:21,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:21,457 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:21,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:21,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:21,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:21,578 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:21,578 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:00:21,578 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [27] [2018-12-24 14:00:21,579 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:21,579 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:21,582 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:21,582 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:00:21,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:21,582 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:21,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:21,582 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:21,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:21,592 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:21,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:21,710 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:21,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:00:21,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:21,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:21,744 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:00:21,779 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:21,780 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:21,781 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:21,786 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:21,786 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:00:21,830 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:21,831 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:21,832 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:21,833 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:21,834 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:21,835 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:21,836 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:00:21,837 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:21,854 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:21,871 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:21,888 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:21,913 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:21,917 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:00:21,920 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:00:21,924 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:00:21,928 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:00:21,936 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:00:21,936 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:21,963 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:21,983 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:22,000 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:22,013 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:22,025 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:22,058 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:22,058 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2018-12-24 14:00:22,111 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,112 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:00:22,112 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:22,139 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:22,139 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2018-12-24 14:00:22,168 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,169 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,169 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,170 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,171 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,172 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,175 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 14:00:22,176 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:22,210 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:22,210 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:40 [2018-12-24 14:00:22,273 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,275 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,277 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,278 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,280 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,281 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,282 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:22,284 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,284 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2018-12-24 14:00:22,285 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:22,321 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:22,321 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:34 [2018-12-24 14:00:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:22,340 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:22,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:22,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:00:22,398 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:22,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:00:22,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:00:22,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:00:22,399 INFO L87 Difference]: Start difference. First operand 122 states and 724 transitions. Second operand 10 states. [2018-12-24 14:00:22,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:22,933 INFO L93 Difference]: Finished difference Result 165 states and 829 transitions. [2018-12-24 14:00:22,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:00:22,934 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:00:22,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:22,935 INFO L225 Difference]: With dead ends: 165 [2018-12-24 14:00:22,935 INFO L226 Difference]: Without dead ends: 163 [2018-12-24 14:00:22,936 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:00:22,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-12-24 14:00:22,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 125. [2018-12-24 14:00:22,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-12-24 14:00:22,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 745 transitions. [2018-12-24 14:00:22,963 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 745 transitions. Word has length 5 [2018-12-24 14:00:22,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:22,964 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 745 transitions. [2018-12-24 14:00:22,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:00:22,964 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 745 transitions. [2018-12-24 14:00:22,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:22,964 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:22,964 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:22,965 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:22,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:22,965 INFO L82 PathProgramCache]: Analyzing trace with hash 28829936, now seen corresponding path program 1 times [2018-12-24 14:00:22,965 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:22,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:22,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:22,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:22,966 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:00:23,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:23,103 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:23,103 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:00:23,104 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [28], [29] [2018-12-24 14:00:23,105 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:23,105 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:23,107 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:23,107 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:23,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:23,108 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:23,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:23,108 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:23,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:23,117 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:23,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:23,145 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:23,148 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:00:23,158 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:23,160 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:23,160 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:00:23,166 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:23,168 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:23,170 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:23,170 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:00:23,178 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:23,180 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:23,182 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:23,184 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:23,184 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:00:23,197 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:00:23,198 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:23,233 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:23,256 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:23,277 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:23,291 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:23,303 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:23,333 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:23,333 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:00:23,365 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:23,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:23,366 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:00:23,401 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:23,402 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:23,404 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:23,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:23,405 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:00:23,449 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:23,450 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:23,451 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:23,452 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:23,453 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:23,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:23,455 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:00:23,456 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:23,471 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:23,487 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:23,503 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:23,537 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:23,537 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 14:00:24,028 WARN L181 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2018-12-24 14:00:24,033 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,033 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:00:24,034 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:24,066 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:24,066 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 14:00:24,089 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,090 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,091 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,092 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,092 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,093 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,094 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:24,095 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2018-12-24 14:00:24,096 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:24,126 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:24,126 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:42 [2018-12-24 14:00:24,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:24,143 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:24,181 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:24,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 8 [2018-12-24 14:00:24,181 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:24,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-24 14:00:24,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-24 14:00:24,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:00:24,182 INFO L87 Difference]: Start difference. First operand 125 states and 745 transitions. Second operand 7 states. [2018-12-24 14:00:24,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:24,469 INFO L93 Difference]: Finished difference Result 158 states and 796 transitions. [2018-12-24 14:00:24,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:00:24,469 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 5 [2018-12-24 14:00:24,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:24,471 INFO L225 Difference]: With dead ends: 158 [2018-12-24 14:00:24,472 INFO L226 Difference]: Without dead ends: 156 [2018-12-24 14:00:24,472 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2018-12-24 14:00:24,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-12-24 14:00:24,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 128. [2018-12-24 14:00:24,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-12-24 14:00:24,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 760 transitions. [2018-12-24 14:00:24,501 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 760 transitions. Word has length 5 [2018-12-24 14:00:24,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:24,501 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 760 transitions. [2018-12-24 14:00:24,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-24 14:00:24,502 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 760 transitions. [2018-12-24 14:00:24,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:24,502 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:24,502 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:24,503 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:24,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:24,503 INFO L82 PathProgramCache]: Analyzing trace with hash 28831546, now seen corresponding path program 2 times [2018-12-24 14:00:24,503 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:24,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:24,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:24,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:24,504 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:24,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:24,611 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:24,612 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:00:24,612 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:00:24,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:24,612 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:24,621 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:00:24,622 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:00:24,628 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:00:24,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:00:24,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:24,657 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,658 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:00:24,695 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,696 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,697 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:00:24,738 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,739 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,739 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,741 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:00:24,794 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,796 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,798 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,799 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,801 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,801 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:00:24,865 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,867 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,868 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,869 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,870 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,872 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,873 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,874 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,875 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:00:24,875 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:24,904 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:24,931 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:24,958 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:24,985 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:25,020 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:25,023 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:00:25,027 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:00:25,030 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:00:25,032 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:00:25,036 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:00:25,037 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:25,072 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:25,093 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:25,110 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:25,124 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:25,136 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:25,182 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:25,183 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2018-12-24 14:00:25,239 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:25,240 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:00:25,240 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:25,285 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:25,286 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:00:25,306 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:25,308 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:25,309 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:25,310 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:25,312 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:25,313 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:25,314 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:25,315 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:25,316 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:00:25,317 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:25,374 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:25,374 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2018-12-24 14:00:25,401 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:25,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:25,404 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:25,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:25,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:25,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:25,408 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:25,410 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:25,411 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:25,412 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:25,413 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:25,414 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:25,415 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:25,415 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:25,416 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2018-12-24 14:00:25,417 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:25,469 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:25,469 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2018-12-24 14:00:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:25,493 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:25,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:25,540 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:25,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2018-12-24 14:00:25,540 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:25,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:00:25,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:00:25,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-12-24 14:00:25,541 INFO L87 Difference]: Start difference. First operand 128 states and 760 transitions. Second operand 10 states. [2018-12-24 14:00:26,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:26,251 INFO L93 Difference]: Finished difference Result 241 states and 1191 transitions. [2018-12-24 14:00:26,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:00:26,252 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:00:26,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:26,254 INFO L225 Difference]: With dead ends: 241 [2018-12-24 14:00:26,254 INFO L226 Difference]: Without dead ends: 235 [2018-12-24 14:00:26,255 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:00:26,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-12-24 14:00:26,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 164. [2018-12-24 14:00:26,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-12-24 14:00:26,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 1007 transitions. [2018-12-24 14:00:26,294 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 1007 transitions. Word has length 5 [2018-12-24 14:00:26,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:26,294 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 1007 transitions. [2018-12-24 14:00:26,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:00:26,294 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 1007 transitions. [2018-12-24 14:00:26,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:26,295 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:26,295 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:26,295 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:26,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:26,296 INFO L82 PathProgramCache]: Analyzing trace with hash 28831858, now seen corresponding path program 1 times [2018-12-24 14:00:26,296 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:26,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:26,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:00:26,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:26,297 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:00:26,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:26,685 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:26,686 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:00:26,686 INFO L207 CegarAbsIntRunner]: [0], [6], [24], [28], [29] [2018-12-24 14:00:26,687 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:26,687 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:26,689 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:26,689 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:26,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:26,690 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:26,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:26,690 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 14:00:26,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:26,706 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:26,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:26,814 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:26,817 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:00:26,822 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,823 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,824 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:00:26,828 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,828 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,830 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,830 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:00:26,834 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,835 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,836 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,837 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,838 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:00:26,846 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:00:26,846 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:26,876 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:26,899 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:26,940 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:26,956 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:26,968 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:26,995 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,996 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:00:27,029 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,030 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,031 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:00:27,068 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,069 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,071 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,072 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,073 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:00:27,117 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,119 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,122 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,123 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,124 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:00:27,124 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:27,145 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:27,161 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:27,178 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:27,211 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:27,212 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 14:00:27,478 WARN L181 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2018-12-24 14:00:27,642 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,642 INFO L303 Elim1Store]: Index analysis took 160 ms [2018-12-24 14:00:27,651 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2018-12-24 14:00:27,652 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:00:27,763 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:00:27,764 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:106 [2018-12-24 14:00:28,008 WARN L181 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2018-12-24 14:00:28,014 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:28,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:28,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:28,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:28,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:28,019 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:28,020 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 72 [2018-12-24 14:00:28,020 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:28,092 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:28,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:28,100 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:28,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:28,103 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:28,106 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:28,108 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:28,109 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:28,138 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 65 treesize of output 107 [2018-12-24 14:00:28,143 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 16 xjuncts. [2018-12-24 14:00:28,493 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: 25 dim-0 vars, and 6 xjuncts. [2018-12-24 14:00:28,493 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 11 variables, input treesize:126, output treesize:280 [2018-12-24 14:00:28,727 WARN L181 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 90 [2018-12-24 14:00:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:28,731 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:28,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:28,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:00:28,834 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:28,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:28,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:28,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:28,835 INFO L87 Difference]: Start difference. First operand 164 states and 1007 transitions. Second operand 8 states. [2018-12-24 14:00:29,368 WARN L181 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2018-12-24 14:00:29,875 WARN L181 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2018-12-24 14:00:30,412 WARN L181 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2018-12-24 14:00:30,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:30,773 INFO L93 Difference]: Finished difference Result 208 states and 1150 transitions. [2018-12-24 14:00:30,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:00:30,774 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:00:30,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:30,777 INFO L225 Difference]: With dead ends: 208 [2018-12-24 14:00:30,777 INFO L226 Difference]: Without dead ends: 207 [2018-12-24 14:00:30,778 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:00:30,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-12-24 14:00:30,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 181. [2018-12-24 14:00:30,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-12-24 14:00:30,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 1128 transitions. [2018-12-24 14:00:30,813 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 1128 transitions. Word has length 5 [2018-12-24 14:00:30,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:30,813 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 1128 transitions. [2018-12-24 14:00:30,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:30,813 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 1128 transitions. [2018-12-24 14:00:30,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:30,814 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:30,814 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:30,814 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:30,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:30,815 INFO L82 PathProgramCache]: Analyzing trace with hash 28818278, now seen corresponding path program 1 times [2018-12-24 14:00:30,815 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:30,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:30,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:30,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:30,815 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:30,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:30,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:30,968 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:30,968 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:00:30,969 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [24], [27] [2018-12-24 14:00:30,970 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:30,970 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:30,972 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:30,972 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:00:30,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:30,972 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:30,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:30,973 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 14:00:30,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:30,982 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:30,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:31,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:00:31,048 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,049 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,049 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:00:31,088 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,089 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,090 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,090 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,091 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:00:31,136 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,137 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,138 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,139 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,141 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,142 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,142 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:00:31,143 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:31,158 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:31,174 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:31,190 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:31,215 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:31,218 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:00:31,222 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:00:31,225 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:00:31,229 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:00:31,238 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:00:31,239 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:31,266 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:31,287 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:31,303 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:31,317 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:31,329 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:31,363 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:31,364 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 14:00:31,645 WARN L181 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2018-12-24 14:00:31,654 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,664 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2018-12-24 14:00:31,665 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:00:31,774 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2018-12-24 14:00:31,775 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:109 [2018-12-24 14:00:32,022 WARN L181 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2018-12-24 14:00:32,029 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,030 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,032 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,034 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,035 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,036 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,037 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,047 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 103 [2018-12-24 14:00:32,049 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:00:32,216 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,217 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,218 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,219 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,221 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,222 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,223 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,224 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 89 [2018-12-24 14:00:32,224 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:32,313 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: 11 dim-0 vars, and 3 xjuncts. [2018-12-24 14:00:32,313 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:129, output treesize:125 [2018-12-24 14:00:32,543 WARN L181 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2018-12-24 14:00:32,559 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,561 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,562 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,564 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,566 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,567 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,569 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,571 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,572 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,574 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,575 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,576 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,577 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,578 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:32,603 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 118 [2018-12-24 14:00:32,607 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 8 xjuncts. [2018-12-24 14:00:32,908 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,909 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,910 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,911 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,912 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,913 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,915 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,916 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,917 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,917 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:32,918 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,919 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 88 [2018-12-24 14:00:32,920 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:33,075 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:33,076 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:33,078 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:33,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:33,080 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:33,081 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:33,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:33,083 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:33,084 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:33,085 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:33,086 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:33,087 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:33,088 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:33,089 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 110 [2018-12-24 14:00:33,090 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:33,259 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 3 dim-1 vars, End of recursive call: 25 dim-0 vars, and 6 xjuncts. [2018-12-24 14:00:33,260 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 16 variables, input treesize:156, output treesize:242 [2018-12-24 14:00:33,399 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 84 [2018-12-24 14:00:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:33,400 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:33,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:33,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:00:33,458 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:33,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:00:33,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:00:33,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:00:33,459 INFO L87 Difference]: Start difference. First operand 181 states and 1128 transitions. Second operand 10 states. [2018-12-24 14:00:34,330 WARN L181 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2018-12-24 14:00:34,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:34,904 INFO L93 Difference]: Finished difference Result 280 states and 1534 transitions. [2018-12-24 14:00:34,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-24 14:00:34,904 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:00:34,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:34,907 INFO L225 Difference]: With dead ends: 280 [2018-12-24 14:00:34,907 INFO L226 Difference]: Without dead ends: 279 [2018-12-24 14:00:34,907 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:00:34,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-12-24 14:00:34,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 185. [2018-12-24 14:00:34,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-12-24 14:00:34,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 1156 transitions. [2018-12-24 14:00:34,954 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 1156 transitions. Word has length 5 [2018-12-24 14:00:34,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:34,954 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 1156 transitions. [2018-12-24 14:00:34,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:00:34,955 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 1156 transitions. [2018-12-24 14:00:34,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:34,956 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:34,956 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:34,956 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:34,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:34,956 INFO L82 PathProgramCache]: Analyzing trace with hash 28835766, now seen corresponding path program 1 times [2018-12-24 14:00:34,956 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:34,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:34,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:34,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:34,957 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:00:35,080 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 14:00:35,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-24 14:00:35,080 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:00:35,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 14:00:35,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 14:00:35,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-24 14:00:35,081 INFO L87 Difference]: Start difference. First operand 185 states and 1156 transitions. Second operand 4 states. [2018-12-24 14:00:35,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:35,184 INFO L93 Difference]: Finished difference Result 201 states and 1179 transitions. [2018-12-24 14:00:35,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-24 14:00:35,185 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-12-24 14:00:35,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:35,188 INFO L225 Difference]: With dead ends: 201 [2018-12-24 14:00:35,188 INFO L226 Difference]: Without dead ends: 198 [2018-12-24 14:00:35,189 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-24 14:00:35,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-12-24 14:00:35,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 187. [2018-12-24 14:00:35,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-12-24 14:00:35,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 1164 transitions. [2018-12-24 14:00:35,234 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 1164 transitions. Word has length 5 [2018-12-24 14:00:35,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:35,235 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 1164 transitions. [2018-12-24 14:00:35,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 14:00:35,235 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 1164 transitions. [2018-12-24 14:00:35,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:35,236 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:35,236 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:35,236 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:35,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:35,237 INFO L82 PathProgramCache]: Analyzing trace with hash 28822248, now seen corresponding path program 1 times [2018-12-24 14:00:35,237 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:35,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:35,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:35,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:35,238 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:00:35,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:35,331 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:35,331 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:00:35,332 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [28], [29] [2018-12-24 14:00:35,332 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:35,332 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:35,335 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:35,335 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:35,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:35,335 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:35,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:35,336 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:35,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:35,343 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:35,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:35,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:35,370 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,370 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:00:35,401 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,404 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:00:35,442 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,444 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,446 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,448 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,448 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:00:35,492 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,493 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,495 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,497 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,499 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,500 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,501 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:00:35,502 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:35,524 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:35,544 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:35,569 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:35,600 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:35,603 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:00:35,605 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:00:35,607 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:00:35,610 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:00:35,616 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:00:35,616 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:35,643 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:35,664 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:35,678 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:35,692 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:35,704 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:35,737 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:35,738 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 14:00:35,772 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,773 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:00:35,773 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:35,802 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:35,803 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 14:00:35,825 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,826 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,828 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,829 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,829 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:35,830 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2018-12-24 14:00:35,831 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:35,862 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:35,862 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:42 [2018-12-24 14:00:35,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:35,880 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:35,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:35,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:00:35,921 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:35,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:35,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:35,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:35,921 INFO L87 Difference]: Start difference. First operand 187 states and 1164 transitions. Second operand 8 states. [2018-12-24 14:00:36,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:36,248 INFO L93 Difference]: Finished difference Result 208 states and 1202 transitions. [2018-12-24 14:00:36,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:00:36,249 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:00:36,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:36,252 INFO L225 Difference]: With dead ends: 208 [2018-12-24 14:00:36,252 INFO L226 Difference]: Without dead ends: 207 [2018-12-24 14:00:36,253 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:00:36,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-12-24 14:00:36,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2018-12-24 14:00:36,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-12-24 14:00:36,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 1178 transitions. [2018-12-24 14:00:36,288 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 1178 transitions. Word has length 5 [2018-12-24 14:00:36,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:36,289 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 1178 transitions. [2018-12-24 14:00:36,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:36,289 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 1178 transitions. [2018-12-24 14:00:36,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:36,290 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:36,290 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:36,290 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:36,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:36,290 INFO L82 PathProgramCache]: Analyzing trace with hash 29302748, now seen corresponding path program 1 times [2018-12-24 14:00:36,291 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:36,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:36,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:36,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:36,292 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:36,369 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:36,369 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:36,369 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:00:36,369 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [28], [29] [2018-12-24 14:00:36,371 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:36,371 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:36,374 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:36,375 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:36,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:36,375 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:36,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:36,375 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:36,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:36,384 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:36,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:36,394 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:00:36,412 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,416 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,416 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:00:36,457 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,459 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,465 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,466 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:00:36,520 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,522 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,523 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,525 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,526 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,531 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,531 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:00:36,532 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:36,551 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:36,569 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:36,593 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:36,627 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:36,633 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:00:36,638 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:00:36,642 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:00:36,646 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:00:36,657 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:00:36,658 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:36,686 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:36,707 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:36,722 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:36,735 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:36,749 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:36,782 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:36,783 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2018-12-24 14:00:36,825 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,826 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2018-12-24 14:00:36,826 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:36,856 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:36,856 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2018-12-24 14:00:36,878 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,879 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,880 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,881 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,883 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,884 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,885 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,886 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2018-12-24 14:00:36,887 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:36,914 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:36,914 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:34 [2018-12-24 14:00:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:36,933 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:36,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:36,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:36,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:00:36,979 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:36,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:36,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:36,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:36,980 INFO L87 Difference]: Start difference. First operand 189 states and 1178 transitions. Second operand 8 states. [2018-12-24 14:00:37,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:37,294 INFO L93 Difference]: Finished difference Result 210 states and 1196 transitions. [2018-12-24 14:00:37,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:00:37,295 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:00:37,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:37,298 INFO L225 Difference]: With dead ends: 210 [2018-12-24 14:00:37,299 INFO L226 Difference]: Without dead ends: 208 [2018-12-24 14:00:37,299 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:00:37,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-12-24 14:00:37,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 191. [2018-12-24 14:00:37,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-12-24 14:00:37,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 1179 transitions. [2018-12-24 14:00:37,344 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 1179 transitions. Word has length 5 [2018-12-24 14:00:37,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:37,344 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 1179 transitions. [2018-12-24 14:00:37,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:37,345 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 1179 transitions. [2018-12-24 14:00:37,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:37,345 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:37,345 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:37,346 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:37,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:37,346 INFO L82 PathProgramCache]: Analyzing trace with hash 29308202, now seen corresponding path program 2 times [2018-12-24 14:00:37,346 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:37,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:37,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:37,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:37,347 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:37,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:37,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:37,466 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:37,466 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:00:37,466 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:00:37,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:37,466 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:37,474 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:00:37,474 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:00:37,480 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:00:37,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:00:37,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:37,519 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,520 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:00:37,565 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,567 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,568 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:00:37,618 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,620 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,622 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,623 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,624 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:00:37,683 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,685 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,687 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,690 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,693 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,694 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,695 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:00:37,803 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,805 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,806 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,808 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,810 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,811 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,813 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,814 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:00:37,815 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:37,862 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:37,890 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:37,922 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:37,955 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:37,997 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:38,000 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:00:38,003 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:00:38,005 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:00:38,008 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:00:38,015 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:00:38,016 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,351 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,370 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,385 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,399 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,411 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,457 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:38,458 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:00:38,497 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,497 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:00:38,498 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,545 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:38,545 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:00:38,575 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,576 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,577 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,577 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,578 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,579 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,580 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,581 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,582 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:00:38,582 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,630 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:38,630 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2018-12-24 14:00:38,656 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,656 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,657 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,658 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,658 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,660 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,661 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,662 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,663 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,664 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,665 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,666 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,667 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,668 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,669 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:38,670 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 124 [2018-12-24 14:00:38,670 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,721 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:38,722 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2018-12-24 14:00:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:38,743 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:38,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:38,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:00:38,802 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:38,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:00:38,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:00:38,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:00:38,803 INFO L87 Difference]: Start difference. First operand 191 states and 1179 transitions. Second operand 10 states. [2018-12-24 14:00:40,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:40,452 INFO L93 Difference]: Finished difference Result 242 states and 1308 transitions. [2018-12-24 14:00:40,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:00:40,453 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:00:40,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:40,456 INFO L225 Difference]: With dead ends: 242 [2018-12-24 14:00:40,456 INFO L226 Difference]: Without dead ends: 240 [2018-12-24 14:00:40,457 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:00:40,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-12-24 14:00:40,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 202. [2018-12-24 14:00:40,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-12-24 14:00:40,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 1251 transitions. [2018-12-24 14:00:40,506 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 1251 transitions. Word has length 5 [2018-12-24 14:00:40,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:40,506 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 1251 transitions. [2018-12-24 14:00:40,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:00:40,506 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 1251 transitions. [2018-12-24 14:00:40,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:40,507 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:40,507 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:40,507 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:40,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:40,508 INFO L82 PathProgramCache]: Analyzing trace with hash 29307954, now seen corresponding path program 1 times [2018-12-24 14:00:40,508 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:40,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:40,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:00:40,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:40,509 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:40,651 WARN L181 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-12-24 14:00:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:41,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:41,013 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:41,013 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:00:41,013 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [24], [27] [2018-12-24 14:00:41,014 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:41,014 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:41,016 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:41,017 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:00:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:41,017 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:41,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:41,017 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:41,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:41,030 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:41,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:41,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:41,256 WARN L181 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2018-12-24 14:00:41,267 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:41,287 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:00:41,323 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,329 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,330 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:00:41,333 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,334 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,334 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,335 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:00:41,339 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,341 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,343 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,344 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:00:41,348 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,349 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,350 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,351 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,352 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,353 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:00:41,354 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:41,394 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:41,418 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:41,438 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:41,453 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:41,467 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:41,501 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,502 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:00:41,541 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,542 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,543 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:00:41,582 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,584 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,585 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,586 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,587 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:00:41,635 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,636 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,637 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,639 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,640 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,642 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,643 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:00:41,708 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,710 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,711 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,712 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,713 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,714 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,715 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,716 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,717 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:00:41,718 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:41,742 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:41,769 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:41,832 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:41,857 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:41,903 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:41,904 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:00:41,939 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,940 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:00:41,941 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:41,986 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:41,986 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:00:42,015 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,017 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,021 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,022 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:00:42,023 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:42,073 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:42,073 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2018-12-24 14:00:42,098 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,100 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,103 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,104 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,107 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,108 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,109 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,110 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,111 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,112 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,112 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:42,113 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 134 [2018-12-24 14:00:42,114 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:42,169 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:42,169 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2018-12-24 14:00:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:42,189 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:42,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:42,248 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:42,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:00:42,249 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:42,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:00:42,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:00:42,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:00:42,249 INFO L87 Difference]: Start difference. First operand 202 states and 1251 transitions. Second operand 10 states. [2018-12-24 14:00:42,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:42,869 INFO L93 Difference]: Finished difference Result 249 states and 1369 transitions. [2018-12-24 14:00:42,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:00:42,870 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:00:42,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:42,873 INFO L225 Difference]: With dead ends: 249 [2018-12-24 14:00:42,873 INFO L226 Difference]: Without dead ends: 247 [2018-12-24 14:00:42,874 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:00:42,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-12-24 14:00:42,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 212. [2018-12-24 14:00:42,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-12-24 14:00:42,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 1326 transitions. [2018-12-24 14:00:42,912 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 1326 transitions. Word has length 5 [2018-12-24 14:00:42,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:42,912 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 1326 transitions. [2018-12-24 14:00:42,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:00:42,912 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 1326 transitions. [2018-12-24 14:00:42,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:42,913 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:42,913 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:42,913 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:42,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:42,914 INFO L82 PathProgramCache]: Analyzing trace with hash 29294624, now seen corresponding path program 1 times [2018-12-24 14:00:42,914 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:42,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:42,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:42,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:42,914 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:43,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:43,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:43,028 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:43,028 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:00:43,028 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [22], [27] [2018-12-24 14:00:43,031 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:43,031 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:43,033 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:43,033 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:00:43,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:43,033 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:43,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:43,033 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:43,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:43,042 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:43,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:43,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:43,074 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:43,076 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:00:43,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,080 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,081 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:00:43,100 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,105 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:00:43,108 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,110 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,112 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,114 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,114 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:00:43,125 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:00:43,125 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:43,155 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:43,177 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:43,195 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:43,210 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:43,224 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:43,254 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,255 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:00:43,287 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,288 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,289 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:00:43,326 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,328 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,329 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,330 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,331 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:00:43,376 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,377 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,378 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,380 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,381 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,382 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,383 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:00:43,383 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:43,401 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:43,417 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:43,433 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:43,467 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:43,467 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2018-12-24 14:00:43,523 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,524 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:00:43,524 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:43,553 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:43,554 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2018-12-24 14:00:43,581 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,582 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,582 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,583 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,584 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,585 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,586 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,587 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2018-12-24 14:00:43,588 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:43,622 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:43,623 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:38 [2018-12-24 14:00:43,653 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,654 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,655 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,656 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,658 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,659 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,660 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,661 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,662 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,664 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,665 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,665 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:43,666 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2018-12-24 14:00:43,667 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:43,724 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:43,725 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:36 [2018-12-24 14:00:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:43,744 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:43,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:43,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:00:43,805 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:43,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:00:43,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:00:43,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:00:43,806 INFO L87 Difference]: Start difference. First operand 212 states and 1326 transitions. Second operand 10 states. [2018-12-24 14:00:44,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:44,356 INFO L93 Difference]: Finished difference Result 260 states and 1437 transitions. [2018-12-24 14:00:44,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:00:44,357 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:00:44,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:44,360 INFO L225 Difference]: With dead ends: 260 [2018-12-24 14:00:44,360 INFO L226 Difference]: Without dead ends: 258 [2018-12-24 14:00:44,361 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2018-12-24 14:00:44,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-12-24 14:00:44,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 221. [2018-12-24 14:00:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-12-24 14:00:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 1389 transitions. [2018-12-24 14:00:44,395 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 1389 transitions. Word has length 5 [2018-12-24 14:00:44,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:44,396 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 1389 transitions. [2018-12-24 14:00:44,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:00:44,396 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 1389 transitions. [2018-12-24 14:00:44,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:44,396 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:44,397 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:44,397 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:44,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:44,397 INFO L82 PathProgramCache]: Analyzing trace with hash 29298904, now seen corresponding path program 1 times [2018-12-24 14:00:44,397 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:44,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:44,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:44,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:44,398 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:44,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:44,521 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:44,521 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:00:44,522 INFO L207 CegarAbsIntRunner]: [0], [14], [22], [28], [29] [2018-12-24 14:00:44,522 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:44,522 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:44,526 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:44,526 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:44,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:44,527 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:44,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:44,527 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:44,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:44,536 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:44,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:44,556 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:44,587 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:00:44,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,592 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:00:44,597 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,598 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,601 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,602 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:00:44,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,607 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,609 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,610 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:00:44,614 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,615 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,617 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,619 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,620 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,621 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:00:44,621 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:44,680 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:44,701 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:44,719 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:44,733 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:44,745 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:44,774 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2018-12-24 14:00:44,792 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,794 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,795 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2018-12-24 14:00:44,834 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,835 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,838 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,839 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,840 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2018-12-24 14:00:44,887 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,888 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,889 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,891 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,892 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,894 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,895 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:00:44,955 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,958 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,959 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,960 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,962 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,963 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,964 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,965 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:00:44,966 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:44,991 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:45,014 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:45,037 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:45,064 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:45,109 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:45,109 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2018-12-24 14:00:45,135 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:45,136 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2018-12-24 14:00:45,136 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:45,180 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:45,181 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2018-12-24 14:00:45,204 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:45,205 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:45,206 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:45,207 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:45,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:45,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:45,211 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:45,212 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:45,213 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 101 [2018-12-24 14:00:45,213 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:45,258 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:45,258 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:77, output treesize:55 [2018-12-24 14:00:45,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:45,278 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:45,327 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:45,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:00:45,328 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:45,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:45,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:45,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:45,328 INFO L87 Difference]: Start difference. First operand 221 states and 1389 transitions. Second operand 8 states. [2018-12-24 14:00:45,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:45,658 INFO L93 Difference]: Finished difference Result 244 states and 1417 transitions. [2018-12-24 14:00:45,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:00:45,659 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:00:45,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:45,662 INFO L225 Difference]: With dead ends: 244 [2018-12-24 14:00:45,663 INFO L226 Difference]: Without dead ends: 243 [2018-12-24 14:00:45,663 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:00:45,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-12-24 14:00:45,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 221. [2018-12-24 14:00:45,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-12-24 14:00:45,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 1389 transitions. [2018-12-24 14:00:45,713 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 1389 transitions. Word has length 5 [2018-12-24 14:00:45,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:45,713 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 1389 transitions. [2018-12-24 14:00:45,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:45,714 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 1389 transitions. [2018-12-24 14:00:45,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:45,714 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:45,715 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:45,715 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:45,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:45,715 INFO L82 PathProgramCache]: Analyzing trace with hash 29366174, now seen corresponding path program 1 times [2018-12-24 14:00:45,715 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:45,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:45,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:45,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:45,716 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:45,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:45,967 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:45,967 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:00:45,968 INFO L207 CegarAbsIntRunner]: [0], [22], [24], [28], [29] [2018-12-24 14:00:45,968 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:45,968 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:45,970 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:45,970 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:45,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:45,971 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:45,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:45,971 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 14:00:45,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:45,979 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:45,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:45,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:45,988 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:45,994 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:00:46,000 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:46,002 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:46,002 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:00:46,008 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:46,009 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:46,011 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:46,012 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:00:46,015 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:46,017 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:46,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:46,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:46,020 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:00:46,029 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:00:46,030 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:46,055 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:46,077 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:46,094 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:46,107 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:46,121 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:46,145 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:00:46,160 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:46,162 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:46,163 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:00:46,194 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:46,195 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:46,197 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:46,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:46,199 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:00:46,238 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:46,239 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:46,241 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:46,242 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:46,243 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:46,245 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:46,246 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:00:46,246 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:46,262 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:46,277 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:46,295 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:46,330 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:46,331 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2018-12-24 14:00:46,527 WARN L181 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2018-12-24 14:00:46,545 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:46,584 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 87 [2018-12-24 14:00:46,591 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 32 xjuncts. [2018-12-24 14:00:46,945 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 21 dim-0 vars, and 7 xjuncts. [2018-12-24 14:00:46,945 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:425 [2018-12-24 14:00:47,095 WARN L181 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 90 [2018-12-24 14:00:47,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,103 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,104 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,104 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:47,105 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 88 [2018-12-24 14:00:47,106 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:47,212 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,213 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,215 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,216 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,217 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,218 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,219 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,220 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 92 [2018-12-24 14:00:47,221 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:47,310 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,312 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,313 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,314 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,315 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,316 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,317 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 71 [2018-12-24 14:00:47,317 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:47,393 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 3 dim-1 vars, End of recursive call: 11 dim-0 vars, and 3 xjuncts. [2018-12-24 14:00:47,394 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 14 variables, input treesize:194, output treesize:126 [2018-12-24 14:00:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:47,492 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:47,549 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:47,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:00:47,550 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:47,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:47,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:47,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:47,550 INFO L87 Difference]: Start difference. First operand 221 states and 1389 transitions. Second operand 8 states. [2018-12-24 14:00:47,954 WARN L181 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2018-12-24 14:00:48,311 WARN L181 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2018-12-24 14:00:56,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:56,855 INFO L93 Difference]: Finished difference Result 273 states and 1446 transitions. [2018-12-24 14:00:56,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:00:56,855 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:00:56,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:56,859 INFO L225 Difference]: With dead ends: 273 [2018-12-24 14:00:56,859 INFO L226 Difference]: Without dead ends: 272 [2018-12-24 14:00:56,859 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:00:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2018-12-24 14:00:56,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 222. [2018-12-24 14:00:56,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2018-12-24 14:00:56,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 1396 transitions. [2018-12-24 14:00:56,896 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 1396 transitions. Word has length 5 [2018-12-24 14:00:56,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:56,897 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 1396 transitions. [2018-12-24 14:00:56,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:56,897 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 1396 transitions. [2018-12-24 14:00:56,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:56,897 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:56,897 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:56,898 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:56,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:56,898 INFO L82 PathProgramCache]: Analyzing trace with hash 29353958, now seen corresponding path program 2 times [2018-12-24 14:00:56,898 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:56,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:56,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:56,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:56,899 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:57,049 WARN L181 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 14 [2018-12-24 14:00:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:57,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:57,067 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:57,067 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:00:57,067 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:00:57,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:57,068 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:57,078 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:00:57,078 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:00:57,085 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:00:57,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:00:57,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:57,108 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:57,111 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:00:57,115 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,117 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:00:57,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,122 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,123 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,124 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:00:57,129 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,130 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,131 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,133 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,133 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:00:57,146 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,147 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,148 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,149 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,150 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,151 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:00:57,152 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:57,194 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:57,217 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:57,237 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:57,253 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:57,267 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:57,300 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,301 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:00:57,339 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,341 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,341 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:00:57,383 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,384 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,385 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,386 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,387 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:00:57,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,439 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,440 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,442 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,443 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,444 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,445 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:00:57,510 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,512 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,513 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,514 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,515 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,516 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,518 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,519 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:00:57,520 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:57,546 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:57,572 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:57,599 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:57,624 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:57,671 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:57,671 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2018-12-24 14:00:57,700 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,700 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:00:57,701 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:57,747 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:57,747 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:00:57,772 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,773 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,774 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,775 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,776 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,777 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,778 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,779 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:57,780 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 112 [2018-12-24 14:00:57,781 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:57,828 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:57,829 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2018-12-24 14:00:57,882 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,883 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,884 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,885 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,886 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,887 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,888 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,889 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,890 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,891 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,893 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,894 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 115 [2018-12-24 14:00:57,894 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:57,944 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:57,945 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:51 [2018-12-24 14:00:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:57,964 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:58,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:58,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:00:58,009 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:58,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:00:58,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:00:58,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:00:58,010 INFO L87 Difference]: Start difference. First operand 222 states and 1396 transitions. Second operand 10 states. [2018-12-24 14:00:58,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:58,781 INFO L93 Difference]: Finished difference Result 274 states and 1519 transitions. [2018-12-24 14:00:58,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:00:58,781 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:00:58,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:58,785 INFO L225 Difference]: With dead ends: 274 [2018-12-24 14:00:58,785 INFO L226 Difference]: Without dead ends: 273 [2018-12-24 14:00:58,786 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:00:58,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-12-24 14:00:58,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 225. [2018-12-24 14:00:58,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-12-24 14:00:58,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 1417 transitions. [2018-12-24 14:00:58,832 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 1417 transitions. Word has length 5 [2018-12-24 14:00:58,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:58,832 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 1417 transitions. [2018-12-24 14:00:58,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:00:58,832 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 1417 transitions. [2018-12-24 14:00:58,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:58,833 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:58,833 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:58,833 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:58,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:58,833 INFO L82 PathProgramCache]: Analyzing trace with hash 29372004, now seen corresponding path program 1 times [2018-12-24 14:00:58,833 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:58,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:58,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:00:58,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:58,834 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:58,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:58,945 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:58,945 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:00:58,945 INFO L207 CegarAbsIntRunner]: [0], [24], [28], [30], [31] [2018-12-24 14:00:58,946 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:58,946 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:58,949 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:58,949 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 14:00:58,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:58,949 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:58,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:58,950 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 14:00:58,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:58,959 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:58,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:58,969 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2018-12-24 14:00:58,985 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,986 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,987 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2018-12-24 14:00:59,024 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,025 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,028 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,029 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,030 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2018-12-24 14:00:59,091 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,092 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,092 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,093 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,094 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,096 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,097 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:00:59,157 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,159 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,160 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,161 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,162 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,163 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,165 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,167 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,168 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:00:59,168 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:59,191 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:59,214 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:59,239 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:59,268 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:59,302 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:00:59,306 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:00:59,310 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:00:59,315 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:00:59,320 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:00:59,324 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:00:59,324 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:59,358 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:59,378 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:59,393 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:59,405 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:59,418 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:59,462 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:59,462 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:84, output treesize:87 [2018-12-24 14:00:59,485 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,486 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2018-12-24 14:00:59,486 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:59,530 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:59,530 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:97, output treesize:67 [2018-12-24 14:00:59,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:59,548 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:59,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:59,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:59,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:00:59,576 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:59,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:00:59,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:00:59,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:00:59,577 INFO L87 Difference]: Start difference. First operand 225 states and 1417 transitions. Second operand 6 states. [2018-12-24 14:00:59,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:59,788 INFO L93 Difference]: Finished difference Result 242 states and 1433 transitions. [2018-12-24 14:00:59,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:00:59,789 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-12-24 14:00:59,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:59,792 INFO L225 Difference]: With dead ends: 242 [2018-12-24 14:00:59,792 INFO L226 Difference]: Without dead ends: 241 [2018-12-24 14:00:59,792 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:00:59,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-12-24 14:00:59,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 225. [2018-12-24 14:00:59,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-12-24 14:00:59,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 1417 transitions. [2018-12-24 14:00:59,835 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 1417 transitions. Word has length 5 [2018-12-24 14:00:59,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:59,836 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 1417 transitions. [2018-12-24 14:00:59,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:00:59,836 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 1417 transitions. [2018-12-24 14:00:59,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:59,837 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:59,837 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:59,837 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:59,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:59,837 INFO L82 PathProgramCache]: Analyzing trace with hash 29357926, now seen corresponding path program 1 times [2018-12-24 14:00:59,838 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:59,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:59,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:59,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:59,839 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:00,033 WARN L181 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2018-12-24 14:01:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:00,066 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:00,066 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:00,066 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:01:00,067 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [24], [27] [2018-12-24 14:01:00,068 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:00,068 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:00,069 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:00,070 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:01:00,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:00,070 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:00,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:00,071 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:00,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:00,079 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:00,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:00,106 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,107 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:00,143 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,145 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,145 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:00,188 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,189 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,190 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,191 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,192 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:00,243 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,244 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,246 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,247 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,248 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,249 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,250 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:00,315 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,316 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,316 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,317 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,318 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,319 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,321 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,322 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:00,323 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:00,350 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:00,377 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:00,404 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:00,430 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:00,463 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:01:00,468 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:01:00,470 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:01:00,473 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:01:00,475 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:01:00,479 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:01:00,480 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:00,514 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:00,535 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:00,552 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:00,566 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:00,578 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:00,624 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:00,625 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:01:00,661 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,661 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:01:00,662 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:00,708 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:00,709 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:01:00,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,743 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,746 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,748 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,749 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,750 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:01:00,751 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:00,801 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:00,801 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2018-12-24 14:01:00,829 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,831 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,832 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,833 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,834 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,835 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,836 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,837 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,839 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,840 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,841 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,842 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,843 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,843 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:00,844 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 128 [2018-12-24 14:01:00,845 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:00,895 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:00,896 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2018-12-24 14:01:00,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:00,917 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:00,972 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:00,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:01:00,972 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:00,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:01:00,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:01:00,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:01:00,973 INFO L87 Difference]: Start difference. First operand 225 states and 1417 transitions. Second operand 10 states. [2018-12-24 14:01:01,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:01,629 INFO L93 Difference]: Finished difference Result 276 states and 1527 transitions. [2018-12-24 14:01:01,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:01:01,630 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:01:01,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:01,633 INFO L225 Difference]: With dead ends: 276 [2018-12-24 14:01:01,633 INFO L226 Difference]: Without dead ends: 274 [2018-12-24 14:01:01,634 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:01:01,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2018-12-24 14:01:01,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 234. [2018-12-24 14:01:01,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-12-24 14:01:01,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 1480 transitions. [2018-12-24 14:01:01,685 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 1480 transitions. Word has length 5 [2018-12-24 14:01:01,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:01,685 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 1480 transitions. [2018-12-24 14:01:01,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:01:01,685 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 1480 transitions. [2018-12-24 14:01:01,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:01:01,686 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:01,686 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:01:01,686 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:01,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:01,686 INFO L82 PathProgramCache]: Analyzing trace with hash 28933724, now seen corresponding path program 1 times [2018-12-24 14:01:01,686 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:01,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:01,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:01,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:01,687 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:01,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:01,770 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:01,770 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:01:01,770 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [28], [29] [2018-12-24 14:01:01,772 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:01,772 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:01,774 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:01,775 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:01:01,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:01,775 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:01,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:01,775 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:01,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:01,789 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:01,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:01,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:01,813 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,814 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:01:01,843 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,844 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:01:01,880 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,881 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,882 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,883 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,884 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:01:01,929 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,930 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,930 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,931 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,932 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,933 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,934 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:01:01,934 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:01,951 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:01,968 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:01,986 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,011 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:01:02,014 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:01:02,018 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:01:02,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:01:02,025 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:01:02,032 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:01:02,033 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,060 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,081 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,097 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,111 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,125 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,163 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:02,164 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2018-12-24 14:01:02,249 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,250 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:01:02,250 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,514 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:02,514 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 14:01:02,536 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,537 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,538 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,539 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,540 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,541 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,542 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,543 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 14:01:02,544 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,582 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:02,583 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2018-12-24 14:01:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:02,603 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:02,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:02,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:02,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:01:02,659 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:02,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:02,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:02,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:02,660 INFO L87 Difference]: Start difference. First operand 234 states and 1480 transitions. Second operand 8 states. [2018-12-24 14:01:03,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:03,055 INFO L93 Difference]: Finished difference Result 288 states and 1635 transitions. [2018-12-24 14:01:03,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:01:03,055 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:01:03,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:03,059 INFO L225 Difference]: With dead ends: 288 [2018-12-24 14:01:03,059 INFO L226 Difference]: Without dead ends: 287 [2018-12-24 14:01:03,060 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2018-12-24 14:01:03,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-12-24 14:01:03,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 250. [2018-12-24 14:01:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-12-24 14:01:03,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 1595 transitions. [2018-12-24 14:01:03,110 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 1595 transitions. Word has length 5 [2018-12-24 14:01:03,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:03,110 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 1595 transitions. [2018-12-24 14:01:03,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:03,110 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 1595 transitions. [2018-12-24 14:01:03,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:01:03,111 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:03,111 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:01:03,111 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:03,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:03,111 INFO L82 PathProgramCache]: Analyzing trace with hash 28941412, now seen corresponding path program 1 times [2018-12-24 14:01:03,111 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:03,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:03,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:03,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:03,112 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:03,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:03,156 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:03,156 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:01:03,156 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [28], [29] [2018-12-24 14:01:03,158 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:03,158 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:03,160 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:03,160 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:01:03,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:03,161 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:03,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:03,161 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:03,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:03,172 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:03,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:03,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:03,182 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:01:03,186 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:01:03,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,201 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:01:03,206 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,213 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,213 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:01:03,218 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,223 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,226 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,228 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,228 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:01:03,237 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:01:03,237 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,263 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,284 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,299 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,310 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,324 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,346 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:01:03,360 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,362 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,363 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:01:03,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,396 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,397 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,398 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:01:03,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,439 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,440 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,441 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,442 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,444 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,445 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:01:03,446 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,459 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,473 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,489 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,520 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:03,521 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:64, output treesize:67 [2018-12-24 14:01:03,552 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,561 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:01:03,562 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:01:03,657 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:01:03,657 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:92 [2018-12-24 14:01:03,687 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,688 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,689 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,690 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,691 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,692 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2018-12-24 14:01:03,692 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,713 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:03,713 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:27 [2018-12-24 14:01:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:03,728 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:03,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:03,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:03,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:01:03,762 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:03,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:03,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:03,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:01:03,762 INFO L87 Difference]: Start difference. First operand 250 states and 1595 transitions. Second operand 8 states. [2018-12-24 14:01:04,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:04,214 INFO L93 Difference]: Finished difference Result 319 states and 1823 transitions. [2018-12-24 14:01:04,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:01:04,214 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:01:04,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:04,219 INFO L225 Difference]: With dead ends: 319 [2018-12-24 14:01:04,219 INFO L226 Difference]: Without dead ends: 318 [2018-12-24 14:01:04,219 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:04,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-12-24 14:01:04,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 276. [2018-12-24 14:01:04,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2018-12-24 14:01:04,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 1782 transitions. [2018-12-24 14:01:04,278 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 1782 transitions. Word has length 5 [2018-12-24 14:01:04,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:04,279 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 1782 transitions. [2018-12-24 14:01:04,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:04,279 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 1782 transitions. [2018-12-24 14:01:04,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:01:04,280 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:04,280 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-12-24 14:01:04,280 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:04,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:04,280 INFO L82 PathProgramCache]: Analyzing trace with hash 904691166, now seen corresponding path program 1 times [2018-12-24 14:01:04,280 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:04,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:04,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:04,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:04,281 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:01:04,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:04,343 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:04,343 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:01:04,344 INFO L207 CegarAbsIntRunner]: [0], [18], [28], [30], [31] [2018-12-24 14:01:04,345 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:04,345 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:04,346 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:04,347 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 14:01:04,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:04,347 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:04,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:04,347 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:04,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:04,357 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:04,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:04,370 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:01:04,390 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,394 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:01:04,428 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,435 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,436 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,437 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:01:04,513 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,518 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,519 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,520 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,521 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,525 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,525 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:01:04,525 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,545 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,564 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,586 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,615 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:01:04,620 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:01:04,625 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:01:04,628 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:01:04,633 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:01:04,643 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:01:04,643 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,668 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,687 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,701 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,713 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,725 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,756 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:04,756 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:64, output treesize:67 [2018-12-24 14:01:04,817 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,817 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2018-12-24 14:01:04,817 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,844 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:04,844 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2018-12-24 14:01:04,863 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,865 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,866 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,867 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,869 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,871 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,872 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,873 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 74 [2018-12-24 14:01:04,873 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,902 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:04,902 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:58, output treesize:46 [2018-12-24 14:01:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:04,920 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:04,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:04,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 8 [2018-12-24 14:01:04,957 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:04,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-24 14:01:04,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-24 14:01:04,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:01:04,958 INFO L87 Difference]: Start difference. First operand 276 states and 1782 transitions. Second operand 7 states. [2018-12-24 14:01:05,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:05,175 INFO L93 Difference]: Finished difference Result 290 states and 1801 transitions. [2018-12-24 14:01:05,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:01:05,175 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-12-24 14:01:05,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:05,179 INFO L225 Difference]: With dead ends: 290 [2018-12-24 14:01:05,179 INFO L226 Difference]: Without dead ends: 289 [2018-12-24 14:01:05,179 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:05,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2018-12-24 14:01:05,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 276. [2018-12-24 14:01:05,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2018-12-24 14:01:05,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 1782 transitions. [2018-12-24 14:01:05,246 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 1782 transitions. Word has length 6 [2018-12-24 14:01:05,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:05,247 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 1782 transitions. [2018-12-24 14:01:05,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-24 14:01:05,247 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 1782 transitions. [2018-12-24 14:01:05,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:01:05,248 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:05,248 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-12-24 14:01:05,248 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:05,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:05,248 INFO L82 PathProgramCache]: Analyzing trace with hash 904323688, now seen corresponding path program 3 times [2018-12-24 14:01:05,249 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:05,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:05,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:05,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:05,249 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:05,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:01:05,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:05,391 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:05,392 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:01:05,392 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:01:05,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:05,392 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:05,401 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-24 14:01:05,401 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-24 14:01:05,406 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-24 14:01:05,406 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:01:05,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:05,426 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:01:05,429 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:01:05,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,433 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,434 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:01:05,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,439 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,441 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,442 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:01:05,448 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,450 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,451 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,453 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,454 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:01:05,470 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:01:05,470 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:05,499 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:05,522 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:05,541 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:05,556 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:05,569 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:05,597 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,598 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:01:05,626 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,628 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,628 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:01:05,670 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,672 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,674 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:01:05,718 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,719 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,720 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,722 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,724 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,724 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:01:05,725 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:05,742 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:05,758 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:05,782 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:05,815 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:05,816 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2018-12-24 14:01:05,851 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,852 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:01:05,852 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:05,880 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:05,881 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 14:01:05,978 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,979 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,980 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,981 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,982 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,983 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,984 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,985 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 14:01:05,986 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:06,020 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:06,021 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:40 [2018-12-24 14:01:06,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,039 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,039 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,040 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,042 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,043 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,044 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,045 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,046 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,047 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,048 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,049 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,050 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,051 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2018-12-24 14:01:06,051 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:06,091 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:06,091 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:38 [2018-12-24 14:01:06,110 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,110 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,111 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,112 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,114 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,115 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,117 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,119 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,122 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:06,123 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2018-12-24 14:01:06,123 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:06,163 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:06,163 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:38 [2018-12-24 14:01:06,179 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:06,179 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:06,209 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:06,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:06,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2018-12-24 14:01:06,229 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:06,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-24 14:01:06,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-24 14:01:06,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:01:06,230 INFO L87 Difference]: Start difference. First operand 276 states and 1782 transitions. Second operand 11 states. [2018-12-24 14:01:06,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:06,883 INFO L93 Difference]: Finished difference Result 423 states and 2543 transitions. [2018-12-24 14:01:06,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-24 14:01:06,883 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2018-12-24 14:01:06,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:06,888 INFO L225 Difference]: With dead ends: 423 [2018-12-24 14:01:06,888 INFO L226 Difference]: Without dead ends: 421 [2018-12-24 14:01:06,889 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:01:06,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2018-12-24 14:01:07,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 325. [2018-12-24 14:01:07,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2018-12-24 14:01:07,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 2130 transitions. [2018-12-24 14:01:07,009 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 2130 transitions. Word has length 6 [2018-12-24 14:01:07,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:07,010 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 2130 transitions. [2018-12-24 14:01:07,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-24 14:01:07,010 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 2130 transitions. [2018-12-24 14:01:07,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:01:07,011 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:07,011 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:01:07,012 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:07,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:07,012 INFO L82 PathProgramCache]: Analyzing trace with hash 904327844, now seen corresponding path program 1 times [2018-12-24 14:01:07,012 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:07,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:07,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:01:07,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:07,013 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:07,157 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-12-24 14:01:07,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:01:07,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:07,360 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:07,360 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:01:07,360 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [22], [28], [29] [2018-12-24 14:01:07,361 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:07,361 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:07,363 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:07,363 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:01:07,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:07,364 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:07,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:07,365 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:07,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:07,373 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:07,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:07,400 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:01:07,403 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:01:07,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,407 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:01:07,412 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,413 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,414 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,414 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:01:07,419 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,421 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,422 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,423 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,424 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:01:07,428 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,429 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,431 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,433 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,433 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:01:07,434 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:07,475 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:07,498 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:07,517 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:07,531 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:07,545 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:07,579 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,580 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:07,657 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,660 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,661 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:07,703 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,705 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,706 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,707 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,708 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:07,761 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,762 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,763 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,765 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,766 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,767 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,768 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:07,833 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,834 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,836 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,837 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,838 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,839 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,840 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,841 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,842 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:07,843 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:07,868 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:07,894 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:07,921 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:07,948 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:07,995 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:07,996 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:01:08,031 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,032 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:01:08,033 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:08,076 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:08,077 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:01:08,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,103 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,106 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,107 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,108 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,109 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,110 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,111 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:01:08,112 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:08,162 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:08,163 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2018-12-24 14:01:08,189 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,190 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,191 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,192 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,194 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,195 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,196 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,197 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,200 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,202 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,203 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,204 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,205 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:08,206 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 119 [2018-12-24 14:01:08,207 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:08,255 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:08,256 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:49 [2018-12-24 14:01:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:08,281 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:08,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:08,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:08,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:01:08,396 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:08,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:01:08,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:01:08,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:01:08,397 INFO L87 Difference]: Start difference. First operand 325 states and 2130 transitions. Second operand 10 states. [2018-12-24 14:01:09,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:09,093 INFO L93 Difference]: Finished difference Result 368 states and 2210 transitions. [2018-12-24 14:01:09,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:01:09,094 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:01:09,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:09,098 INFO L225 Difference]: With dead ends: 368 [2018-12-24 14:01:09,098 INFO L226 Difference]: Without dead ends: 366 [2018-12-24 14:01:09,099 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:01:09,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2018-12-24 14:01:09,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 329. [2018-12-24 14:01:09,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2018-12-24 14:01:09,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 2135 transitions. [2018-12-24 14:01:09,179 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 2135 transitions. Word has length 6 [2018-12-24 14:01:09,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:09,179 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 2135 transitions. [2018-12-24 14:01:09,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:01:09,179 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 2135 transitions. [2018-12-24 14:01:09,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:01:09,180 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:09,180 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-12-24 14:01:09,181 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:09,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:09,181 INFO L82 PathProgramCache]: Analyzing trace with hash 904329640, now seen corresponding path program 3 times [2018-12-24 14:01:09,181 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:09,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:09,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:09,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:09,182 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:01:09,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:09,231 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:09,231 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:01:09,231 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:01:09,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:09,231 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:09,241 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-24 14:01:09,242 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-24 14:01:09,247 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-24 14:01:09,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:01:09,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:09,271 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:01:09,273 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:01:09,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,277 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,277 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:01:09,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,321 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:01:09,356 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,377 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,378 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,379 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,379 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:01:09,383 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,383 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,385 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,386 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,387 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,388 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:01:09,388 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:09,429 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:09,456 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:09,495 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:09,510 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:09,523 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:09,555 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,555 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:09,592 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,594 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,594 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:09,637 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,639 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,640 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,641 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,642 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:09,693 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,695 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,696 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,697 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,698 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,699 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,700 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:09,764 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,765 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,766 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,767 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,768 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,770 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,771 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,772 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,773 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:09,773 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:09,799 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:09,825 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:09,851 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:09,878 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:09,924 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:09,924 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2018-12-24 14:01:09,953 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,953 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:01:09,954 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:09,996 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:09,996 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:01:10,021 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,023 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,024 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,026 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,027 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,028 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,029 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,030 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:01:10,030 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:10,080 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:10,080 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2018-12-24 14:01:10,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,103 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,104 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,107 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,108 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,109 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,110 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,111 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,112 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,114 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:10,115 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,116 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2018-12-24 14:01:10,116 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:10,166 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:10,167 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2018-12-24 14:01:10,190 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,191 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,192 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,194 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,195 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,196 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,197 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,200 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,202 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,203 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,204 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,206 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,207 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,209 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,210 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 135 [2018-12-24 14:01:10,211 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:10,268 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:10,268 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:45 [2018-12-24 14:01:10,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:10,293 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:10,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:10,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2018-12-24 14:01:10,354 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:10,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-24 14:01:10,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-24 14:01:10,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:01:10,355 INFO L87 Difference]: Start difference. First operand 329 states and 2135 transitions. Second operand 11 states. [2018-12-24 14:01:11,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:11,140 INFO L93 Difference]: Finished difference Result 407 states and 2353 transitions. [2018-12-24 14:01:11,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:01:11,141 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2018-12-24 14:01:11,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:11,145 INFO L225 Difference]: With dead ends: 407 [2018-12-24 14:01:11,145 INFO L226 Difference]: Without dead ends: 401 [2018-12-24 14:01:11,146 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2018-12-24 14:01:11,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2018-12-24 14:01:11,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 341. [2018-12-24 14:01:11,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-12-24 14:01:11,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 2222 transitions. [2018-12-24 14:01:11,236 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 2222 transitions. Word has length 6 [2018-12-24 14:01:11,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:11,237 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 2222 transitions. [2018-12-24 14:01:11,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-24 14:01:11,237 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 2222 transitions. [2018-12-24 14:01:11,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:01:11,238 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:11,238 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:01:11,238 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:11,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:11,239 INFO L82 PathProgramCache]: Analyzing trace with hash 904329206, now seen corresponding path program 1 times [2018-12-24 14:01:11,239 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:11,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:11,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:01:11,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:11,240 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:11,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:11,433 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:11,433 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:01:11,434 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [24], [27] [2018-12-24 14:01:11,436 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:11,436 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:11,439 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:11,439 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:01:11,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:11,440 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:11,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:11,440 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:11,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:11,456 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:11,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:11,488 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:01:11,492 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:01:11,521 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,522 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,523 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:01:11,552 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,553 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,554 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,554 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:01:11,557 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,559 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,560 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,561 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:01:11,565 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,566 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,567 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,568 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,570 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,570 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:01:11,571 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:11,613 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:11,636 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:11,653 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:11,668 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:11,682 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:11,715 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,716 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:11,753 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,754 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,755 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:11,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,798 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,799 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,800 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,801 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:11,852 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,853 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,854 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,855 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,856 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,857 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,858 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:11,923 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,924 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,926 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,927 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,929 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,930 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,931 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,932 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:11,933 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:11,959 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:11,986 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:12,012 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:12,039 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:12,085 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:12,085 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:01:12,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,122 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:01:12,123 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:12,163 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:12,163 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:01:12,192 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,193 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,194 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,195 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,196 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,197 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,200 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:01:12,201 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:12,246 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:12,247 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2018-12-24 14:01:12,272 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,273 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,275 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,278 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,279 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,280 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,281 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,284 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,284 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:12,285 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,286 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2018-12-24 14:01:12,287 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:12,340 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:12,341 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2018-12-24 14:01:12,362 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,363 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,365 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,367 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,369 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,370 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,371 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,372 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,373 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,375 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,376 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,376 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:12,377 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,378 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 124 [2018-12-24 14:01:12,379 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:12,431 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:12,432 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2018-12-24 14:01:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:12,456 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:12,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:12,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:12,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2018-12-24 14:01:12,522 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:12,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:01:12,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:01:12,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:01:12,523 INFO L87 Difference]: Start difference. First operand 341 states and 2222 transitions. Second operand 12 states. [2018-12-24 14:01:13,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:13,590 INFO L93 Difference]: Finished difference Result 645 states and 3901 transitions. [2018-12-24 14:01:13,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-24 14:01:13,590 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-12-24 14:01:13,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:13,597 INFO L225 Difference]: With dead ends: 645 [2018-12-24 14:01:13,598 INFO L226 Difference]: Without dead ends: 643 [2018-12-24 14:01:13,598 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-12-24 14:01:13,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2018-12-24 14:01:13,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 463. [2018-12-24 14:01:13,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2018-12-24 14:01:13,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 3101 transitions. [2018-12-24 14:01:13,718 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 3101 transitions. Word has length 6 [2018-12-24 14:01:13,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:13,719 INFO L480 AbstractCegarLoop]: Abstraction has 463 states and 3101 transitions. [2018-12-24 14:01:13,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:01:13,719 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 3101 transitions. [2018-12-24 14:01:13,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:01:13,720 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:13,720 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:01:13,720 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:13,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:13,721 INFO L82 PathProgramCache]: Analyzing trace with hash 904333674, now seen corresponding path program 1 times [2018-12-24 14:01:13,721 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:13,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:13,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:13,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:13,722 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:13,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:13,820 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:13,820 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:13,820 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:01:13,821 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [28], [30], [31] [2018-12-24 14:01:13,822 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:13,822 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:13,824 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:13,824 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:01:13,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:13,824 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:13,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:13,824 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:13,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:13,840 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:13,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:13,877 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:01:13,912 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:01:13,917 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:13,918 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:13,919 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:01:13,924 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:13,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:13,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:13,926 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:01:13,930 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:13,933 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:13,934 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:13,935 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:13,936 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:01:13,948 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:01:13,949 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:13,977 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:13,998 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:14,014 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:14,028 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:14,041 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:14,065 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:01:14,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,084 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:01:14,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,117 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,119 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,121 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:01:14,161 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,163 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,164 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,165 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,166 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,168 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,169 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:01:14,169 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:14,185 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:14,199 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:14,215 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:14,246 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:14,247 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2018-12-24 14:01:14,288 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,289 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2018-12-24 14:01:14,289 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:14,315 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:14,316 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2018-12-24 14:01:14,400 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,401 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,402 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,404 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,408 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,409 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,418 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 14:01:14,420 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:01:14,519 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:01:14,519 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:58, output treesize:68 [2018-12-24 14:01:14,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:14,565 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:14,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:14,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2018-12-24 14:01:14,601 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:14,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-24 14:01:14,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-24 14:01:14,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:14,602 INFO L87 Difference]: Start difference. First operand 463 states and 3101 transitions. Second operand 9 states. [2018-12-24 14:01:15,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:15,183 INFO L93 Difference]: Finished difference Result 527 states and 3325 transitions. [2018-12-24 14:01:15,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:01:15,183 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2018-12-24 14:01:15,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:15,189 INFO L225 Difference]: With dead ends: 527 [2018-12-24 14:01:15,189 INFO L226 Difference]: Without dead ends: 524 [2018-12-24 14:01:15,190 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:01:15,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2018-12-24 14:01:15,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 487. [2018-12-24 14:01:15,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 487 states. [2018-12-24 14:01:15,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 3268 transitions. [2018-12-24 14:01:15,323 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 3268 transitions. Word has length 6 [2018-12-24 14:01:15,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:15,323 INFO L480 AbstractCegarLoop]: Abstraction has 487 states and 3268 transitions. [2018-12-24 14:01:15,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-24 14:01:15,323 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 3268 transitions. [2018-12-24 14:01:15,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:01:15,324 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:15,324 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:01:15,325 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:15,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:15,325 INFO L82 PathProgramCache]: Analyzing trace with hash 904320156, now seen corresponding path program 1 times [2018-12-24 14:01:15,325 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:15,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:15,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:15,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:15,326 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:01:15,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:15,402 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:15,402 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:01:15,402 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [28], [29] [2018-12-24 14:01:15,405 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:15,405 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:15,407 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:15,407 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:01:15,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:15,408 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:15,408 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:15,408 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:15,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:15,418 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:15,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:15,440 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:01:15,443 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:01:15,449 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,450 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,450 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:01:15,453 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,454 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,456 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:01:15,469 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,471 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,474 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,475 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:01:15,489 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:01:15,490 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,518 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,542 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,560 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,575 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,588 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,617 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,618 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:01:15,650 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,652 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,652 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:01:15,688 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,690 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,691 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,692 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:01:15,739 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,743 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,746 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,747 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:01:15,747 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,766 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,783 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,800 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,838 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:15,838 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2018-12-24 14:01:15,899 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,899 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:01:15,900 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,930 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:15,931 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2018-12-24 14:01:15,960 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,961 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,962 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,963 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,964 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,966 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 14:01:15,968 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:16,006 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:16,006 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:40 [2018-12-24 14:01:16,033 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,034 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,055 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,056 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,056 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,057 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,058 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,059 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,063 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,063 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:16,064 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 104 [2018-12-24 14:01:16,065 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:16,102 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:16,103 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:36 [2018-12-24 14:01:16,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:16,135 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:16,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:16,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:16,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:01:16,191 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:16,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:01:16,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:01:16,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:01:16,191 INFO L87 Difference]: Start difference. First operand 487 states and 3268 transitions. Second operand 10 states. [2018-12-24 14:01:16,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:16,829 INFO L93 Difference]: Finished difference Result 534 states and 3436 transitions. [2018-12-24 14:01:16,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:01:16,830 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:01:16,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:16,836 INFO L225 Difference]: With dead ends: 534 [2018-12-24 14:01:16,837 INFO L226 Difference]: Without dead ends: 533 [2018-12-24 14:01:16,837 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:01:16,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2018-12-24 14:01:16,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 505. [2018-12-24 14:01:16,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2018-12-24 14:01:16,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 3394 transitions. [2018-12-24 14:01:16,988 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 3394 transitions. Word has length 6 [2018-12-24 14:01:16,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:16,989 INFO L480 AbstractCegarLoop]: Abstraction has 505 states and 3394 transitions. [2018-12-24 14:01:16,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:01:16,989 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 3394 transitions. [2018-12-24 14:01:16,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:01:16,990 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:16,990 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:01:16,990 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:16,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:16,991 INFO L82 PathProgramCache]: Analyzing trace with hash 904806422, now seen corresponding path program 1 times [2018-12-24 14:01:16,991 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:16,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:16,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:16,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:16,992 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:17,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:17,062 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:17,062 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:01:17,062 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [24], [28], [29] [2018-12-24 14:01:17,064 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:17,064 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:17,066 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:17,066 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:01:17,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:17,067 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:17,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:17,067 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:17,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:17,076 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:17,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:17,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:17,085 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:01:17,092 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:01:17,096 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,098 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,099 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:01:17,107 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,108 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,109 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,109 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:01:17,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,119 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,121 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:01:17,126 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,127 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,129 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,129 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,131 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,132 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:01:17,132 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:17,170 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:17,192 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:17,208 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:17,222 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:17,236 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:17,262 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2018-12-24 14:01:17,279 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,281 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,282 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2018-12-24 14:01:17,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,321 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,323 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,324 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2018-12-24 14:01:17,369 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,370 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,371 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,372 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,373 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,375 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,376 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:01:17,436 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,439 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,440 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,441 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,442 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,443 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,445 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,446 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:17,447 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:17,471 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:17,495 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:17,520 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:17,546 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:17,588 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:17,588 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2018-12-24 14:01:17,655 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,656 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2018-12-24 14:01:17,656 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:17,696 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:17,696 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2018-12-24 14:01:17,726 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,726 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,727 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,728 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,728 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,730 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,731 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,732 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,733 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 101 [2018-12-24 14:01:17,734 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:17,777 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:17,777 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:53 [2018-12-24 14:01:17,803 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,804 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,806 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,808 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,810 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,812 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,813 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,816 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,817 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,818 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:17,819 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,820 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 114 [2018-12-24 14:01:17,821 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:17,868 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:17,868 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:43 [2018-12-24 14:01:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:17,894 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:17,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:17,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:01:17,951 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:17,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:01:17,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:01:17,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:01:17,952 INFO L87 Difference]: Start difference. First operand 505 states and 3394 transitions. Second operand 10 states. [2018-12-24 14:01:18,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:18,593 INFO L93 Difference]: Finished difference Result 543 states and 3439 transitions. [2018-12-24 14:01:18,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:01:18,593 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:01:18,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:18,599 INFO L225 Difference]: With dead ends: 543 [2018-12-24 14:01:18,600 INFO L226 Difference]: Without dead ends: 542 [2018-12-24 14:01:18,600 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:01:18,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2018-12-24 14:01:18,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 500. [2018-12-24 14:01:18,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2018-12-24 14:01:18,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 3359 transitions. [2018-12-24 14:01:18,740 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 3359 transitions. Word has length 6 [2018-12-24 14:01:18,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:18,740 INFO L480 AbstractCegarLoop]: Abstraction has 500 states and 3359 transitions. [2018-12-24 14:01:18,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:01:18,740 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 3359 transitions. [2018-12-24 14:01:18,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:01:18,742 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:18,742 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:01:18,742 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:18,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:18,742 INFO L82 PathProgramCache]: Analyzing trace with hash 904796812, now seen corresponding path program 1 times [2018-12-24 14:01:18,742 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:18,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:18,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:18,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:18,743 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:18,907 WARN L181 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-12-24 14:01:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:18,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:18,947 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:18,947 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:01:18,947 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [22], [28], [29] [2018-12-24 14:01:18,948 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:18,948 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:18,950 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:18,950 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:01:18,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:18,951 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:18,951 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:18,951 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:18,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:18,961 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:18,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:18,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:18,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:01:18,976 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:01:18,980 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,981 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,981 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:01:18,993 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,994 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,994 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,995 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:01:18,999 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,001 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,002 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,004 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,004 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:01:19,008 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,009 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,013 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,014 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,015 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:01:19,016 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,056 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,080 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,098 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,112 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,124 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,151 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2018-12-24 14:01:19,167 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,169 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,170 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2018-12-24 14:01:19,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,209 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,211 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,211 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2018-12-24 14:01:19,260 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,261 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,262 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,264 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,265 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,267 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,268 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:01:19,327 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,328 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,329 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,330 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,332 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,334 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,335 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,336 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,337 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:19,337 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,362 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,386 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,411 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,438 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,482 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:19,483 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2018-12-24 14:01:19,521 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,522 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2018-12-24 14:01:19,522 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,563 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:19,564 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2018-12-24 14:01:19,592 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,593 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,594 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,597 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,599 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,600 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,601 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,602 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 101 [2018-12-24 14:01:19,602 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,647 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:19,647 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:53 [2018-12-24 14:01:19,670 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,672 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,675 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,676 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,677 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,678 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,681 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,682 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,683 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,684 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,685 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:19,686 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 119 [2018-12-24 14:01:19,687 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,736 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:19,736 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:45 [2018-12-24 14:01:19,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:19,759 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:19,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:19,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:01:19,818 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:19,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:01:19,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:01:19,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:01:19,819 INFO L87 Difference]: Start difference. First operand 500 states and 3359 transitions. Second operand 10 states. [2018-12-24 14:01:20,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:20,509 INFO L93 Difference]: Finished difference Result 537 states and 3427 transitions. [2018-12-24 14:01:20,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:01:20,509 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:01:20,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:20,513 INFO L225 Difference]: With dead ends: 537 [2018-12-24 14:01:20,513 INFO L226 Difference]: Without dead ends: 536 [2018-12-24 14:01:20,513 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:01:20,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2018-12-24 14:01:20,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 501. [2018-12-24 14:01:20,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 501 states. [2018-12-24 14:01:20,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 3366 transitions. [2018-12-24 14:01:20,651 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 3366 transitions. Word has length 6 [2018-12-24 14:01:20,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:20,652 INFO L480 AbstractCegarLoop]: Abstraction has 501 states and 3366 transitions. [2018-12-24 14:01:20,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:01:20,652 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 3366 transitions. [2018-12-24 14:01:20,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:01:20,653 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:20,653 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:01:20,653 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:20,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:20,653 INFO L82 PathProgramCache]: Analyzing trace with hash 904848706, now seen corresponding path program 1 times [2018-12-24 14:01:20,653 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:20,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:20,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:20,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:20,654 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:20,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:21,055 WARN L181 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2018-12-24 14:01:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:01:21,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:21,129 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:21,130 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:01:21,130 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [24], [28], [29] [2018-12-24 14:01:21,131 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:21,131 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:21,133 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:21,133 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:01:21,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:21,134 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:21,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:21,134 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:21,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:21,162 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:21,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:21,217 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:01:21,220 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:01:21,223 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,224 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,224 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:01:21,228 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,229 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,230 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,230 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:01:21,235 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,236 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,237 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,239 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,239 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:01:21,243 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,244 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,245 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,246 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,247 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,248 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:01:21,249 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:21,288 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:21,312 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:21,331 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:21,346 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:21,360 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:21,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,395 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:21,435 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,436 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,437 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:21,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,482 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:21,534 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,535 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,536 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,537 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,538 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,539 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,540 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:21,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,605 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,607 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,609 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,610 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,611 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,612 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,613 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:21,614 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:21,638 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:21,665 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:21,691 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:21,718 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:21,764 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:21,765 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:01:21,799 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,800 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:01:21,801 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:21,845 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:21,845 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:01:21,878 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,879 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,880 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,881 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,883 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,884 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,884 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:21,885 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2018-12-24 14:01:21,886 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:21,933 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:21,934 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:59 [2018-12-24 14:01:21,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,958 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,959 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,960 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,961 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,962 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,963 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,966 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 115 [2018-12-24 14:01:21,968 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:22,018 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:22,019 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:51 [2018-12-24 14:01:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:22,042 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:22,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:22,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:22,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:01:22,102 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:22,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:01:22,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:01:22,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:01:22,102 INFO L87 Difference]: Start difference. First operand 501 states and 3366 transitions. Second operand 10 states. [2018-12-24 14:01:22,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:22,836 INFO L93 Difference]: Finished difference Result 588 states and 3737 transitions. [2018-12-24 14:01:22,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:01:22,837 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:01:22,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:22,841 INFO L225 Difference]: With dead ends: 588 [2018-12-24 14:01:22,841 INFO L226 Difference]: Without dead ends: 587 [2018-12-24 14:01:22,841 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:01:22,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2018-12-24 14:01:22,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 534. [2018-12-24 14:01:22,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2018-12-24 14:01:22,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 3605 transitions. [2018-12-24 14:01:22,985 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 3605 transitions. Word has length 6 [2018-12-24 14:01:22,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:22,985 INFO L480 AbstractCegarLoop]: Abstraction has 534 states and 3605 transitions. [2018-12-24 14:01:22,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:01:22,985 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 3605 transitions. [2018-12-24 14:01:22,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:01:22,986 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:22,986 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:01:22,986 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:22,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:22,987 INFO L82 PathProgramCache]: Analyzing trace with hash 904869912, now seen corresponding path program 1 times [2018-12-24 14:01:22,987 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:22,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:22,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:22,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:22,988 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:23,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:23,048 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:23,049 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:01:23,049 INFO L207 CegarAbsIntRunner]: [0], [18], [24], [28], [30], [31] [2018-12-24 14:01:23,051 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:23,051 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:23,052 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:23,053 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:01:23,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:23,053 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:23,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:23,054 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 14:01:23,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:23,070 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:23,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:23,085 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:01:23,088 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:01:23,093 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,093 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,094 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:01:23,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,100 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,102 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:01:23,106 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,109 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,110 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,111 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,112 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:01:23,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,117 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,119 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,122 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:01:23,123 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:23,157 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:23,178 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:23,195 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:23,208 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:23,222 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:23,250 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2018-12-24 14:01:23,422 WARN L181 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-12-24 14:01:23,450 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,493 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,494 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2018-12-24 14:01:23,670 WARN L181 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2018-12-24 14:01:23,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,674 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,675 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,676 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,677 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2018-12-24 14:01:23,722 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,724 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,724 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,725 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,727 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,728 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:01:23,791 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,793 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,794 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,795 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,796 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,798 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,801 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,801 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:23,802 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:23,825 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:23,847 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:23,872 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:23,899 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:23,942 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:23,943 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2018-12-24 14:01:23,968 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,968 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2018-12-24 14:01:23,969 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:24,009 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:24,010 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2018-12-24 14:01:24,033 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,033 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,034 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,035 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,035 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,037 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,038 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:24,039 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 102 [2018-12-24 14:01:24,039 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:24,081 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:24,081 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:79, output treesize:55 [2018-12-24 14:01:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:24,103 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:24,142 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:24,142 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:01:24,142 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:24,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:24,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:24,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:24,143 INFO L87 Difference]: Start difference. First operand 534 states and 3605 transitions. Second operand 8 states. [2018-12-24 14:01:24,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:24,636 INFO L93 Difference]: Finished difference Result 558 states and 3635 transitions. [2018-12-24 14:01:24,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:01:24,637 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2018-12-24 14:01:24,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:24,639 INFO L225 Difference]: With dead ends: 558 [2018-12-24 14:01:24,639 INFO L226 Difference]: Without dead ends: 557 [2018-12-24 14:01:24,640 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:01:24,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2018-12-24 14:01:24,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 533. [2018-12-24 14:01:24,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2018-12-24 14:01:24,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 3598 transitions. [2018-12-24 14:01:24,794 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 3598 transitions. Word has length 6 [2018-12-24 14:01:24,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:24,794 INFO L480 AbstractCegarLoop]: Abstraction has 533 states and 3598 transitions. [2018-12-24 14:01:24,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:24,794 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 3598 transitions. [2018-12-24 14:01:24,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:01:24,795 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:24,795 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:01:24,796 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:24,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:24,796 INFO L82 PathProgramCache]: Analyzing trace with hash 904431632, now seen corresponding path program 1 times [2018-12-24 14:01:24,796 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:24,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:24,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:24,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:24,797 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:24,877 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:24,878 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:24,878 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:01:24,878 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [28], [29] [2018-12-24 14:01:24,879 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:24,879 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:24,881 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:24,881 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:01:24,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:24,881 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:24,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:24,882 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:24,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:24,899 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:24,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:24,932 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,933 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:01:24,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,966 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:01:24,998 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,999 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,000 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,001 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,001 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:01:25,046 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,047 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,047 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,048 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,049 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,050 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,051 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:01:25,051 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:25,067 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:25,084 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:25,101 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:25,125 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:01:25,128 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:01:25,132 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:01:25,135 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:01:25,138 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:01:25,145 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:01:25,146 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:25,173 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:25,194 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:25,210 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:25,223 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:25,235 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:25,266 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:25,266 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 14:01:25,299 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,300 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:01:25,300 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:25,328 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:25,328 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 14:01:25,348 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,349 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,350 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,350 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,351 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,351 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:25,352 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 81 [2018-12-24 14:01:25,353 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:25,383 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:25,383 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:42 [2018-12-24 14:01:25,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,408 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,409 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,410 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,411 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,412 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,413 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 90 [2018-12-24 14:01:25,413 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:25,447 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:25,447 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:38 [2018-12-24 14:01:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:25,468 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:25,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:25,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:01:25,508 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:25,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:01:25,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:01:25,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:01:25,509 INFO L87 Difference]: Start difference. First operand 533 states and 3598 transitions. Second operand 10 states. [2018-12-24 14:01:26,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:26,227 INFO L93 Difference]: Finished difference Result 795 states and 5176 transitions. [2018-12-24 14:01:26,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:01:26,228 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:01:26,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:26,233 INFO L225 Difference]: With dead ends: 795 [2018-12-24 14:01:26,233 INFO L226 Difference]: Without dead ends: 794 [2018-12-24 14:01:26,233 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:01:26,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2018-12-24 14:01:26,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 484. [2018-12-24 14:01:26,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-12-24 14:01:26,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 3230 transitions. [2018-12-24 14:01:26,404 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 3230 transitions. Word has length 6 [2018-12-24 14:01:26,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:26,405 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 3230 transitions. [2018-12-24 14:01:26,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:01:26,405 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 3230 transitions. [2018-12-24 14:01:26,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:01:26,406 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:26,406 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:01:26,406 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:26,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:26,407 INFO L82 PathProgramCache]: Analyzing trace with hash 904452838, now seen corresponding path program 1 times [2018-12-24 14:01:26,407 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:26,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:26,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:26,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:26,407 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:26,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:26,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:26,521 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:26,521 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:01:26,521 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [28], [30], [31] [2018-12-24 14:01:26,523 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:26,524 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:26,525 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:26,525 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:01:26,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:26,526 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:26,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:26,526 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:26,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:26,541 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:26,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:26,549 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:01:26,552 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:01:26,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,560 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,560 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:01:26,565 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,567 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,568 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,568 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:01:26,573 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,577 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,579 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,580 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,581 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:01:26,594 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:01:26,595 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:26,622 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:26,644 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:26,660 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:26,674 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:26,687 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:26,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:01:26,725 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,728 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,728 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:01:26,760 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,761 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,763 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,764 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,765 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:01:26,805 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,808 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,810 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,812 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,813 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:01:26,813 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:26,854 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:26,869 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:26,885 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:26,916 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:26,916 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2018-12-24 14:01:26,960 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,961 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2018-12-24 14:01:26,961 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:26,987 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:26,987 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2018-12-24 14:01:27,013 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,015 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,015 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,020 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:27,029 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 81 [2018-12-24 14:01:27,031 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:01:27,124 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:01:27,125 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:58, output treesize:76 [2018-12-24 14:01:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:27,163 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:27,209 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:27,209 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2018-12-24 14:01:27,209 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:27,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-24 14:01:27,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-24 14:01:27,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:27,209 INFO L87 Difference]: Start difference. First operand 484 states and 3230 transitions. Second operand 9 states. [2018-12-24 14:01:28,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:28,017 INFO L93 Difference]: Finished difference Result 539 states and 3425 transitions. [2018-12-24 14:01:28,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:01:28,018 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2018-12-24 14:01:28,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:28,022 INFO L225 Difference]: With dead ends: 539 [2018-12-24 14:01:28,022 INFO L226 Difference]: Without dead ends: 538 [2018-12-24 14:01:28,023 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:01:28,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2018-12-24 14:01:28,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 500. [2018-12-24 14:01:28,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2018-12-24 14:01:28,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 3342 transitions. [2018-12-24 14:01:28,276 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 3342 transitions. Word has length 6 [2018-12-24 14:01:28,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:28,277 INFO L480 AbstractCegarLoop]: Abstraction has 500 states and 3342 transitions. [2018-12-24 14:01:28,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-24 14:01:28,277 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 3342 transitions. [2018-12-24 14:01:28,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:01:28,278 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:28,278 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-12-24 14:01:28,278 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:28,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:28,278 INFO L82 PathProgramCache]: Analyzing trace with hash 893599114, now seen corresponding path program 4 times [2018-12-24 14:01:28,278 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:28,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:28,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:28,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:28,279 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:01:28,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:28,380 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:28,380 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:01:28,380 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:01:28,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:28,381 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:28,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:28,390 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:28,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:28,418 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:01:28,421 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:01:28,425 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,426 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,426 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:01:28,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,434 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,434 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:01:28,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,439 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,440 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,441 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,441 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:01:28,451 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:01:28,451 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:28,480 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:28,504 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:28,523 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:28,538 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:28,551 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:28,579 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,580 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:01:28,611 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,612 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,613 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:01:28,648 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,650 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,651 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,652 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,652 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:01:28,696 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,739 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,746 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,748 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,749 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,749 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:01:28,749 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:28,766 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:28,781 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:28,798 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:28,831 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:28,831 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 14:01:29,096 WARN L181 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2018-12-24 14:01:29,124 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,134 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2018-12-24 14:01:29,135 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:01:29,245 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2018-12-24 14:01:29,246 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:109 [2018-12-24 14:01:29,492 WARN L181 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2018-12-24 14:01:29,497 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,497 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,498 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,500 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,501 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,502 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,503 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,504 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 81 [2018-12-24 14:01:29,504 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:29,579 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,581 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,582 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,588 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,590 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,592 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,601 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 91 [2018-12-24 14:01:29,602 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-12-24 14:01:29,728 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 9 dim-0 vars, and 3 xjuncts. [2018-12-24 14:01:29,728 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:129, output treesize:126 [2018-12-24 14:01:29,993 WARN L181 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2018-12-24 14:01:30,011 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,011 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,013 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,014 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,015 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,017 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,021 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,023 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 101 [2018-12-24 14:01:30,024 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:30,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,122 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,123 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,124 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,125 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,127 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,131 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,132 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,133 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,134 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,135 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,136 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,137 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,138 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,139 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,140 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 111 [2018-12-24 14:01:30,141 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:30,237 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,238 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,238 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,239 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,240 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,241 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,242 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,243 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,244 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,245 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,246 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,247 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,248 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,249 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2018-12-24 14:01:30,250 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:30,335 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 3 dim-1 vars, End of recursive call: 11 dim-0 vars, and 3 xjuncts. [2018-12-24 14:01:30,335 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 14 variables, input treesize:159, output treesize:123 [2018-12-24 14:01:30,595 WARN L181 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2018-12-24 14:01:30,602 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,605 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,606 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,609 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,612 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,614 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,615 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,618 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,619 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,620 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,621 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,622 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,623 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,646 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 125 [2018-12-24 14:01:30,649 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 8 xjuncts. [2018-12-24 14:01:30,962 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,962 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,963 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,964 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,966 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,968 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,969 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,970 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,971 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,972 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,973 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,974 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2018-12-24 14:01:30,975 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:31,124 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,125 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,127 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,128 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,129 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,130 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,131 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,133 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,134 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,134 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:31,135 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,136 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 88 [2018-12-24 14:01:31,137 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:31,273 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 3 dim-1 vars, End of recursive call: 25 dim-0 vars, and 6 xjuncts. [2018-12-24 14:01:31,273 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 16 variables, input treesize:156, output treesize:238 [2018-12-24 14:01:31,421 WARN L181 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 83 [2018-12-24 14:01:31,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:31,423 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:31,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:31,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2018-12-24 14:01:31,522 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:31,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-24 14:01:31,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-24 14:01:31,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:01:31,523 INFO L87 Difference]: Start difference. First operand 500 states and 3342 transitions. Second operand 11 states. [2018-12-24 14:01:31,774 WARN L181 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2018-12-24 14:01:32,458 WARN L181 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2018-12-24 14:01:33,056 WARN L181 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2018-12-24 14:01:33,621 WARN L181 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2018-12-24 14:01:34,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:34,478 INFO L93 Difference]: Finished difference Result 678 states and 4253 transitions. [2018-12-24 14:01:34,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:01:34,478 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2018-12-24 14:01:34,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:34,482 INFO L225 Difference]: With dead ends: 678 [2018-12-24 14:01:34,482 INFO L226 Difference]: Without dead ends: 673 [2018-12-24 14:01:34,483 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2018-12-24 14:01:34,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2018-12-24 14:01:34,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 555. [2018-12-24 14:01:34,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 555 states. [2018-12-24 14:01:34,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 3727 transitions. [2018-12-24 14:01:34,733 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 3727 transitions. Word has length 6 [2018-12-24 14:01:34,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:34,734 INFO L480 AbstractCegarLoop]: Abstraction has 555 states and 3727 transitions. [2018-12-24 14:01:34,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-24 14:01:34,734 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 3727 transitions. [2018-12-24 14:01:34,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:01:34,735 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:34,735 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-12-24 14:01:34,735 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:34,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:34,735 INFO L82 PathProgramCache]: Analyzing trace with hash 893598680, now seen corresponding path program 2 times [2018-12-24 14:01:34,735 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:34,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:34,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:34,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:34,736 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:01:34,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:34,884 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:34,884 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:01:34,884 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:01:34,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:34,884 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:34,894 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:01:34,894 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:01:34,900 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:01:34,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:01:34,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:34,923 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:01:34,925 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:01:34,927 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,929 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:01:34,932 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,934 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,935 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,936 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:01:34,940 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,941 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,942 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,943 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,944 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:01:34,961 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,962 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,963 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,964 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,965 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:01:34,966 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:35,006 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:35,030 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:35,049 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:35,064 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:35,078 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:35,112 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,113 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:35,151 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,153 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,153 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:35,196 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,197 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,200 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:35,252 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,253 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,255 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,256 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,257 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,258 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,259 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:35,324 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,325 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,326 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,327 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,328 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,330 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,331 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,332 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,332 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:35,333 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:35,359 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:35,385 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:35,412 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:35,439 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:35,484 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:35,484 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2018-12-24 14:01:35,514 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,515 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:01:35,516 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:35,566 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:35,566 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:01:35,590 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,592 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,593 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,595 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,597 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,598 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,599 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2018-12-24 14:01:35,599 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:35,646 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:35,646 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2018-12-24 14:01:35,743 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,746 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,749 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,750 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,751 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,752 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,753 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,754 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,755 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,756 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,757 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,758 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,759 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2018-12-24 14:01:35,760 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:35,816 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:35,816 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:55 [2018-12-24 14:01:35,853 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,854 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,855 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,855 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,856 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,857 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,858 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,859 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,861 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,863 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,864 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,865 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,866 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,867 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,868 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 135 [2018-12-24 14:01:35,868 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:35,926 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:35,927 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:45 [2018-12-24 14:01:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:35,955 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:36,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:36,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2018-12-24 14:01:36,024 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:36,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-24 14:01:36,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-24 14:01:36,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:01:36,025 INFO L87 Difference]: Start difference. First operand 555 states and 3727 transitions. Second operand 11 states. [2018-12-24 14:01:36,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:36,901 INFO L93 Difference]: Finished difference Result 704 states and 4501 transitions. [2018-12-24 14:01:36,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:01:36,902 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2018-12-24 14:01:36,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:36,907 INFO L225 Difference]: With dead ends: 704 [2018-12-24 14:01:36,907 INFO L226 Difference]: Without dead ends: 703 [2018-12-24 14:01:36,907 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2018-12-24 14:01:36,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2018-12-24 14:01:37,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 655. [2018-12-24 14:01:37,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 655 states. [2018-12-24 14:01:37,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 4427 transitions. [2018-12-24 14:01:37,189 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 4427 transitions. Word has length 6 [2018-12-24 14:01:37,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:37,189 INFO L480 AbstractCegarLoop]: Abstraction has 655 states and 4427 transitions. [2018-12-24 14:01:37,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-24 14:01:37,189 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 4427 transitions. [2018-12-24 14:01:37,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:01:37,190 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:37,190 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:01:37,190 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:37,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:37,190 INFO L82 PathProgramCache]: Analyzing trace with hash 893604446, now seen corresponding path program 2 times [2018-12-24 14:01:37,190 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:37,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:37,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:01:37,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:37,191 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:37,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:37,358 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:37,358 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:01:37,358 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:01:37,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:37,358 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:37,368 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:01:37,368 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:01:37,374 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:01:37,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:01:37,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:37,403 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:01:37,406 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:01:37,409 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,410 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,411 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:01:37,416 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,419 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,420 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:01:37,424 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,425 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,426 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,427 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,428 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:01:37,433 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,435 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,436 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,437 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,439 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,440 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:01:37,440 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:37,480 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:37,504 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:37,523 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:37,537 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:37,551 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:37,582 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,583 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:37,623 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,624 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,625 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:37,665 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,666 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,667 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,668 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,669 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:37,718 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,719 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,720 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,722 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,724 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,725 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:37,787 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,789 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,790 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,791 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,792 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,793 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,794 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,795 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,796 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:37,796 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:37,823 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:37,849 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:37,875 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:37,901 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:37,948 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:37,948 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:01:37,985 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,986 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:01:37,986 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:38,031 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:38,031 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2018-12-24 14:01:38,059 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,063 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,064 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,065 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,066 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,067 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,068 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2018-12-24 14:01:38,069 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:38,117 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:38,117 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2018-12-24 14:01:38,144 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,145 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,145 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,147 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,148 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,149 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,150 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,152 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,153 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,154 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,155 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,156 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:38,157 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,158 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2018-12-24 14:01:38,158 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:38,208 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:38,208 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2018-12-24 14:01:38,231 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,231 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,232 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,233 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,234 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,235 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,236 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,238 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,239 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,240 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,241 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,242 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,243 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,243 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:38,244 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,245 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 124 [2018-12-24 14:01:38,246 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:38,298 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:38,299 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2018-12-24 14:01:38,325 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:38,325 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:38,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:38,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2018-12-24 14:01:38,395 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:38,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:01:38,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:01:38,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:01:38,396 INFO L87 Difference]: Start difference. First operand 655 states and 4427 transitions. Second operand 12 states. [2018-12-24 14:01:39,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:39,787 INFO L93 Difference]: Finished difference Result 1218 states and 7896 transitions. [2018-12-24 14:01:39,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-24 14:01:39,787 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-12-24 14:01:39,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:39,794 INFO L225 Difference]: With dead ends: 1218 [2018-12-24 14:01:39,794 INFO L226 Difference]: Without dead ends: 1217 [2018-12-24 14:01:39,794 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2018-12-24 14:01:39,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2018-12-24 14:01:40,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 738. [2018-12-24 14:01:40,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 738 states. [2018-12-24 14:01:40,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 5008 transitions. [2018-12-24 14:01:40,153 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 5008 transitions. Word has length 6 [2018-12-24 14:01:40,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:40,154 INFO L480 AbstractCegarLoop]: Abstraction has 738 states and 5008 transitions. [2018-12-24 14:01:40,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:01:40,154 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 5008 transitions. [2018-12-24 14:01:40,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:01:40,155 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:40,155 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:01:40,155 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:40,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:40,155 INFO L82 PathProgramCache]: Analyzing trace with hash 893724170, now seen corresponding path program 1 times [2018-12-24 14:01:40,155 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:40,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:40,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:01:40,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:40,156 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:01:40,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:40,323 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:40,323 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:01:40,323 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [24], [28], [29] [2018-12-24 14:01:40,324 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:40,324 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:40,326 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:40,326 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:01:40,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:40,326 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:40,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:40,327 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:40,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:40,347 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:40,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:40,390 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:01:40,394 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:01:40,397 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,398 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,399 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:01:40,402 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,404 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,405 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:01:40,409 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,410 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,411 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,413 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,413 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:01:40,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,419 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,420 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,421 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,422 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:01:40,422 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:40,463 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:40,487 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:40,505 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:40,519 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:40,533 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:40,568 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,569 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:40,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,605 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,606 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:40,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,651 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,652 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,653 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,654 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:40,707 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,709 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,710 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,711 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,712 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,713 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,714 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:40,780 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,781 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,783 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,784 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,785 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,786 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,788 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,788 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:40,789 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:40,813 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:40,839 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:40,866 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:40,892 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:40,938 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:40,939 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:01:40,975 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,976 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:01:40,976 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,021 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:41,022 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:01:41,057 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,058 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,063 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,064 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,065 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:41,066 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2018-12-24 14:01:41,066 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,114 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:41,114 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:59 [2018-12-24 14:01:41,142 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,143 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,144 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,146 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,147 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,148 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,149 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,150 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,151 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,152 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,153 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,154 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:01:41,155 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,204 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:41,204 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:69, output treesize:47 [2018-12-24 14:01:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:41,230 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:41,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:41,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:01:41,289 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:41,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:01:41,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:01:41,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:01:41,290 INFO L87 Difference]: Start difference. First operand 738 states and 5008 transitions. Second operand 10 states. [2018-12-24 14:01:42,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:42,143 INFO L93 Difference]: Finished difference Result 814 states and 5311 transitions. [2018-12-24 14:01:42,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:01:42,144 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:01:42,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:42,147 INFO L225 Difference]: With dead ends: 814 [2018-12-24 14:01:42,148 INFO L226 Difference]: Without dead ends: 811 [2018-12-24 14:01:42,148 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:01:42,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2018-12-24 14:01:42,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 775. [2018-12-24 14:01:42,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2018-12-24 14:01:42,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 5267 transitions. [2018-12-24 14:01:42,502 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 5267 transitions. Word has length 6 [2018-12-24 14:01:42,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:42,502 INFO L480 AbstractCegarLoop]: Abstraction has 775 states and 5267 transitions. [2018-12-24 14:01:42,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:01:42,502 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 5267 transitions. [2018-12-24 14:01:42,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:01:42,503 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:42,503 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:01:42,503 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:42,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:42,503 INFO L82 PathProgramCache]: Analyzing trace with hash 893714560, now seen corresponding path program 1 times [2018-12-24 14:01:42,503 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:42,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:42,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:42,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:42,504 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:42,695 WARN L181 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2018-12-24 14:01:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:01:42,711 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:42,711 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:42,711 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:01:42,711 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [22], [28], [29] [2018-12-24 14:01:42,712 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:42,713 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:42,714 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:42,714 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:01:42,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:42,715 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:42,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:42,715 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:42,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:42,733 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:42,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:42,759 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,760 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:01:42,793 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,794 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,794 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:01:42,828 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,829 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,830 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,830 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,831 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:01:42,874 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,876 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,877 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,878 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,879 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,880 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:01:42,881 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:42,899 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:42,916 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:42,933 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:42,955 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:01:42,958 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:01:42,961 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:01:42,963 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:01:42,966 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:01:42,976 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:01:42,977 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:43,002 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:43,022 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:43,038 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:43,051 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:43,063 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:43,096 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:43,096 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2018-12-24 14:01:43,152 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,153 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:01:43,153 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:43,183 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:43,183 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2018-12-24 14:01:43,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,209 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,211 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,212 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,213 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,213 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:43,214 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2018-12-24 14:01:43,214 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:43,244 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:43,244 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:42 [2018-12-24 14:01:43,269 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,270 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,271 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,272 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,272 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,273 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,276 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:43,277 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2018-12-24 14:01:43,277 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:43,309 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:43,310 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:52, output treesize:42 [2018-12-24 14:01:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:43,340 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:43,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:43,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2018-12-24 14:01:43,396 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:43,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-24 14:01:43,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-24 14:01:43,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:01:43,396 INFO L87 Difference]: Start difference. First operand 775 states and 5267 transitions. Second operand 9 states. [2018-12-24 14:01:44,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:44,274 INFO L93 Difference]: Finished difference Result 812 states and 5339 transitions. [2018-12-24 14:01:44,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:01:44,275 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2018-12-24 14:01:44,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:44,278 INFO L225 Difference]: With dead ends: 812 [2018-12-24 14:01:44,279 INFO L226 Difference]: Without dead ends: 811 [2018-12-24 14:01:44,279 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:01:44,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2018-12-24 14:01:44,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 780. [2018-12-24 14:01:44,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2018-12-24 14:01:44,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 5302 transitions. [2018-12-24 14:01:44,599 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 5302 transitions. Word has length 6 [2018-12-24 14:01:44,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:44,599 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 5302 transitions. [2018-12-24 14:01:44,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-24 14:01:44,600 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 5302 transitions. [2018-12-24 14:01:44,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:01:44,601 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:44,601 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:01:44,601 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:44,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:44,601 INFO L82 PathProgramCache]: Analyzing trace with hash 893787660, now seen corresponding path program 1 times [2018-12-24 14:01:44,601 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:44,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:44,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:44,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:44,602 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:44,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:01:44,675 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:44,675 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:44,676 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:01:44,676 INFO L207 CegarAbsIntRunner]: [0], [6], [24], [28], [30], [31] [2018-12-24 14:01:44,677 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:44,677 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:44,679 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:44,679 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:01:44,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:44,679 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:44,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:44,680 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:44,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:44,689 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:44,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:44,709 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:01:44,712 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:01:44,715 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,717 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,717 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:01:44,722 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,724 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,725 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,726 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:01:44,729 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,732 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,733 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,734 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,735 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:01:44,740 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,743 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,746 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,747 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:01:44,747 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:44,784 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:44,807 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:44,823 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:44,837 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:44,851 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:44,879 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2018-12-24 14:01:44,895 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,897 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,898 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2018-12-24 14:01:44,937 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,938 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,940 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,941 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,942 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2018-12-24 14:01:44,990 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,992 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,993 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,994 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,995 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,997 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,998 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:01:45,058 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,063 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,064 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,065 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,067 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,068 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:45,069 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:45,094 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:45,119 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:45,143 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:45,170 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:45,213 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:45,214 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2018-12-24 14:01:45,326 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,336 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:01:45,337 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:01:45,483 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:01:45,483 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:138 [2018-12-24 14:01:45,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,531 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,531 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,532 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2018-12-24 14:01:45,532 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:45,566 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:45,566 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:38 [2018-12-24 14:01:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:45,589 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:45,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:45,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:01:45,626 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:45,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:45,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:45,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:01:45,627 INFO L87 Difference]: Start difference. First operand 780 states and 5302 transitions. Second operand 8 states. [2018-12-24 14:01:46,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:46,348 INFO L93 Difference]: Finished difference Result 843 states and 5575 transitions. [2018-12-24 14:01:46,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:01:46,349 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2018-12-24 14:01:46,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:46,351 INFO L225 Difference]: With dead ends: 843 [2018-12-24 14:01:46,351 INFO L226 Difference]: Without dead ends: 842 [2018-12-24 14:01:46,352 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-12-24 14:01:46,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2018-12-24 14:01:46,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 813. [2018-12-24 14:01:46,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 813 states. [2018-12-24 14:01:46,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 5533 transitions. [2018-12-24 14:01:46,723 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 5533 transitions. Word has length 6 [2018-12-24 14:01:46,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:46,723 INFO L480 AbstractCegarLoop]: Abstraction has 813 states and 5533 transitions. [2018-12-24 14:01:46,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:46,723 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 5533 transitions. [2018-12-24 14:01:46,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:01:46,724 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:46,724 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:01:46,724 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:46,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:46,725 INFO L82 PathProgramCache]: Analyzing trace with hash 893774142, now seen corresponding path program 1 times [2018-12-24 14:01:46,725 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:46,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:46,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:46,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:46,726 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:46,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:01:46,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:46,801 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:46,801 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:01:46,801 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [24], [28], [29] [2018-12-24 14:01:46,802 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:46,802 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:46,803 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:46,803 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:01:46,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:46,804 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:46,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:46,804 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:46,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:46,813 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:46,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:46,844 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:01:46,878 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,880 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:01:46,918 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,919 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,921 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,922 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,923 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:01:46,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,968 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,969 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,970 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,972 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,973 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,974 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:01:46,974 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:46,997 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:47,017 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:47,039 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:47,068 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:01:47,071 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:01:47,074 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:01:47,077 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:01:47,078 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:01:47,086 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:01:47,087 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:47,112 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:47,131 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:47,147 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:47,161 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:47,173 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:47,204 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:47,204 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2018-12-24 14:01:47,303 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,317 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2018-12-24 14:01:47,318 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:01:47,427 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:01:47,427 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:106 [2018-12-24 14:01:47,538 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,540 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,543 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,544 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,545 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,550 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,551 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,552 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,583 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 65 treesize of output 103 [2018-12-24 14:01:47,587 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2018-12-24 14:01:47,901 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,902 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,904 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,905 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,906 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,906 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:47,907 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 88 [2018-12-24 14:01:47,908 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:48,072 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 19 dim-0 vars, and 6 xjuncts. [2018-12-24 14:01:48,072 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:126, output treesize:278 [2018-12-24 14:01:54,574 WARN L181 SmtUtils]: Spent 6.37 s on a formula simplification. DAG size of input: 150 DAG size of output: 103 [2018-12-24 14:01:54,580 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,581 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 88 [2018-12-24 14:01:54,581 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:54,703 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,704 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,705 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,706 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,707 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,708 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,709 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,711 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,712 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,712 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:54,713 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,714 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 100 [2018-12-24 14:01:54,715 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:54,840 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,842 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,843 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,844 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,846 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,847 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,848 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,849 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,850 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,851 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:54,852 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,853 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 94 [2018-12-24 14:01:54,853 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:54,969 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,971 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,972 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,973 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,974 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,975 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,977 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,978 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,979 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,980 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,981 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,982 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:54,982 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2018-12-24 14:01:54,983 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,084 INFO L267 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 4 dim-1 vars, End of recursive call: 16 dim-0 vars, and 4 xjuncts. [2018-12-24 14:01:55,085 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 20 variables, input treesize:227, output treesize:173 [2018-12-24 14:01:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:55,194 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:55,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:55,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:01:55,270 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:55,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:01:55,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:01:55,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:01:55,271 INFO L87 Difference]: Start difference. First operand 813 states and 5533 transitions. Second operand 10 states. [2018-12-24 14:01:55,479 WARN L181 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2018-12-24 14:01:55,739 WARN L181 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2018-12-24 14:01:55,918 WARN L181 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2018-12-24 14:01:56,223 WARN L181 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 87 [2018-12-24 14:01:57,160 WARN L181 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 83 [2018-12-24 14:01:57,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:57,473 INFO L93 Difference]: Finished difference Result 896 states and 5824 transitions. [2018-12-24 14:01:57,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:01:57,473 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:01:57,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:57,476 INFO L225 Difference]: With dead ends: 896 [2018-12-24 14:01:57,476 INFO L226 Difference]: Without dead ends: 895 [2018-12-24 14:01:57,476 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2018-12-24 14:01:57,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2018-12-24 14:01:57,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 848. [2018-12-24 14:01:57,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 848 states. [2018-12-24 14:01:57,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 5778 transitions. [2018-12-24 14:01:57,876 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 5778 transitions. Word has length 6 [2018-12-24 14:01:57,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:57,876 INFO L480 AbstractCegarLoop]: Abstraction has 848 states and 5778 transitions. [2018-12-24 14:01:57,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:01:57,876 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 5778 transitions. [2018-12-24 14:01:57,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:01:57,878 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:57,878 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:01:57,879 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:57,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:57,879 INFO L82 PathProgramCache]: Analyzing trace with hash 893364756, now seen corresponding path program 1 times [2018-12-24 14:01:57,879 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:57,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:57,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:57,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:57,880 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:57,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:57,943 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:57,943 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:01:57,943 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [22], [28], [29] [2018-12-24 14:01:57,944 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:57,944 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:57,946 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:57,946 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:01:57,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:57,946 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:57,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:57,947 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:57,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:57,960 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:57,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:57,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:57,985 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,985 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:01:58,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,020 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:01:58,056 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,057 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,058 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,060 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:01:58,103 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,104 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,107 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,108 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,109 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,109 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:01:58,110 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:58,128 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:58,144 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:58,162 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:58,186 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:01:58,189 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:01:58,191 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:01:58,193 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:01:58,195 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:01:58,200 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:01:58,201 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:58,229 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:58,250 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:58,266 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:58,280 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:58,292 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:58,325 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:58,325 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 14:01:58,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,367 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:01:58,367 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:58,398 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:58,398 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 14:01:58,422 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,423 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,423 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,424 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,425 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,426 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,427 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,428 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2018-12-24 14:01:58,428 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:58,461 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:58,462 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:38 [2018-12-24 14:01:58,691 WARN L181 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-12-24 14:01:58,695 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,696 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,696 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,697 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,698 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,699 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,700 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,701 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,702 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,703 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,704 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,704 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:58,706 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2018-12-24 14:01:58,707 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:58,826 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:58,827 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:36 [2018-12-24 14:01:58,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:58,844 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:58,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:58,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:01:58,897 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:58,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:01:58,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:01:58,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:01:58,898 INFO L87 Difference]: Start difference. First operand 848 states and 5778 transitions. Second operand 10 states. [2018-12-24 14:01:59,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:59,981 INFO L93 Difference]: Finished difference Result 975 states and 6393 transitions. [2018-12-24 14:01:59,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:01:59,982 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:01:59,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:59,986 INFO L225 Difference]: With dead ends: 975 [2018-12-24 14:01:59,986 INFO L226 Difference]: Without dead ends: 973 [2018-12-24 14:01:59,986 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:01:59,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2018-12-24 14:02:00,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 930. [2018-12-24 14:02:00,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 930 states. [2018-12-24 14:02:00,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 6346 transitions. [2018-12-24 14:02:00,383 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 6346 transitions. Word has length 6 [2018-12-24 14:02:00,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:00,384 INFO L480 AbstractCegarLoop]: Abstraction has 930 states and 6346 transitions. [2018-12-24 14:02:00,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:02:00,384 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 6346 transitions. [2018-12-24 14:02:00,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:02:00,386 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:00,386 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:02:00,386 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:00,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:00,386 INFO L82 PathProgramCache]: Analyzing trace with hash 893370586, now seen corresponding path program 1 times [2018-12-24 14:02:00,386 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:00,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:00,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:00,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:00,387 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:02:00,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:00,452 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:00,452 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:02:00,453 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [28], [30], [31] [2018-12-24 14:02:00,453 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:02:00,453 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:02:00,455 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:02:00,455 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:02:00,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:00,455 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:02:00,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:00,456 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:02:00,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:00,465 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:02:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:00,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:00,473 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:02:00,479 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:02:00,487 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,489 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,490 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:02:00,499 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,501 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,505 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,505 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:02:00,508 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,511 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,512 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,513 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,514 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:02:00,548 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:02:00,549 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:00,575 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:00,593 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:00,610 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:00,624 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:00,637 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:00,660 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:02:00,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,676 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,676 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:02:00,709 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,710 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,712 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,713 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,714 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:02:00,754 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,755 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,756 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,757 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,759 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,761 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,761 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:02:00,762 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:00,777 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:00,792 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:00,808 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:00,838 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:00,839 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2018-12-24 14:02:00,874 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:02:00,882 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:02:00,975 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:02:00,976 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:88 [2018-12-24 14:02:01,015 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:01,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:01,017 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:01,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:01,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:01,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:01,021 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:01,022 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 86 [2018-12-24 14:02:01,023 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:01,087 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:01,088 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:01,089 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:01,091 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:01,091 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:01,092 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 59 [2018-12-24 14:02:01,092 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:01,136 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:02:01,136 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:108, output treesize:84 [2018-12-24 14:02:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:01,209 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:01,246 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:01,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:02:01,247 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:01,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:02:01,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:02:01,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:02:01,247 INFO L87 Difference]: Start difference. First operand 930 states and 6346 transitions. Second operand 8 states. [2018-12-24 14:02:01,773 WARN L181 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2018-12-24 14:02:01,975 WARN L181 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2018-12-24 14:02:02,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:02:02,846 INFO L93 Difference]: Finished difference Result 985 states and 6551 transitions. [2018-12-24 14:02:02,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:02:02,847 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2018-12-24 14:02:02,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:02:02,850 INFO L225 Difference]: With dead ends: 985 [2018-12-24 14:02:02,850 INFO L226 Difference]: Without dead ends: 984 [2018-12-24 14:02:02,850 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:02:02,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2018-12-24 14:02:03,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 951. [2018-12-24 14:02:03,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 951 states. [2018-12-24 14:02:03,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 6492 transitions. [2018-12-24 14:02:03,299 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 6492 transitions. Word has length 6 [2018-12-24 14:02:03,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:03,299 INFO L480 AbstractCegarLoop]: Abstraction has 951 states and 6492 transitions. [2018-12-24 14:02:03,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:02:03,299 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 6492 transitions. [2018-12-24 14:02:03,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:02:03,301 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:03,301 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:02:03,301 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:03,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:03,301 INFO L82 PathProgramCache]: Analyzing trace with hash 908380782, now seen corresponding path program 1 times [2018-12-24 14:02:03,302 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:03,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:03,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:03,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:03,302 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:03,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:03,433 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:03,433 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:02:03,433 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [22], [24], [27] [2018-12-24 14:02:03,434 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:02:03,434 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:02:03,436 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:02:03,436 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:02:03,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:03,436 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:02:03,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:03,437 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:02:03,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:03,445 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:02:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:03,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:03,604 WARN L181 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2018-12-24 14:02:03,641 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,642 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:02:03,688 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,689 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,690 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:02:03,730 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,731 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,732 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,733 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,734 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:02:03,787 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,789 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,790 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,791 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,792 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,793 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,794 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:02:03,886 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,887 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,888 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,889 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,890 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,891 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,892 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,893 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,894 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:02:03,895 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:03,920 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:03,947 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:03,975 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:04,001 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:04,039 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:02:04,042 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:02:04,045 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:02:04,048 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:02:04,051 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:02:04,053 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:02:04,054 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:04,090 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:04,111 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:04,125 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:04,139 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:04,151 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:04,194 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:04,195 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2018-12-24 14:02:04,240 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,241 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:02:04,241 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:04,287 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:04,287 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2018-12-24 14:02:04,321 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,323 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,324 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,325 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,326 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,327 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,328 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,329 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,330 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2018-12-24 14:02:04,331 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:04,378 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:04,378 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2018-12-24 14:02:04,413 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,414 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,415 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,416 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,417 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,419 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,421 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,422 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,423 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,424 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,424 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:04,425 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,426 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2018-12-24 14:02:04,427 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:04,478 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:04,479 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2018-12-24 14:02:04,509 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,510 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,511 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,512 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,513 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,514 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,515 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,516 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,518 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,520 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,521 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,522 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,522 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:04,523 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,524 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 124 [2018-12-24 14:02:04,525 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:04,575 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:04,576 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2018-12-24 14:02:04,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:04,603 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:04,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:04,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2018-12-24 14:02:04,834 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:04,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:02:04,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:02:04,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:02:04,835 INFO L87 Difference]: Start difference. First operand 951 states and 6492 transitions. Second operand 12 states. [2018-12-24 14:02:09,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:02:09,130 INFO L93 Difference]: Finished difference Result 1024 states and 6701 transitions. [2018-12-24 14:02:09,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:02:09,131 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-12-24 14:02:09,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:02:09,135 INFO L225 Difference]: With dead ends: 1024 [2018-12-24 14:02:09,135 INFO L226 Difference]: Without dead ends: 1023 [2018-12-24 14:02:09,135 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2018-12-24 14:02:09,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2018-12-24 14:02:09,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 948. [2018-12-24 14:02:09,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 948 states. [2018-12-24 14:02:09,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 6467 transitions. [2018-12-24 14:02:09,570 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 6467 transitions. Word has length 6 [2018-12-24 14:02:09,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:09,570 INFO L480 AbstractCegarLoop]: Abstraction has 948 states and 6467 transitions. [2018-12-24 14:02:09,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:02:09,570 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 6467 transitions. [2018-12-24 14:02:09,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:02:09,572 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:09,572 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:02:09,572 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:09,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:09,572 INFO L82 PathProgramCache]: Analyzing trace with hash 908380906, now seen corresponding path program 1 times [2018-12-24 14:02:09,572 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:09,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:09,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:09,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:09,573 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:09,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:09,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:09,735 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:09,735 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:02:09,735 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [22], [24], [27] [2018-12-24 14:02:09,736 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:02:09,736 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:02:09,738 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:02:09,738 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:02:09,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:09,738 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:02:09,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:09,738 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:02:09,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:09,748 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:02:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:09,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:09,774 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:02:09,778 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:02:09,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:09,784 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:09,784 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:02:09,787 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:09,788 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:09,789 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:09,789 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:02:09,793 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:09,794 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:09,795 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:09,796 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:09,797 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:02:09,802 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:09,803 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:09,804 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:09,805 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:09,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:09,807 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:02:09,808 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:09,850 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:09,873 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:09,893 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:09,906 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:09,920 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:09,955 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:09,956 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:02:09,992 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:09,993 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:09,994 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:02:10,037 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,039 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,040 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,041 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:02:10,093 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,094 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,096 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,097 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,098 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,100 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:02:10,166 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,167 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,168 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,169 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,170 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,172 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,173 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,174 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:02:10,175 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:10,202 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:10,228 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:10,256 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:10,284 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:10,331 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:10,331 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2018-12-24 14:02:10,375 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,376 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:02:10,377 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:10,424 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:10,424 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2018-12-24 14:02:10,461 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,463 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,465 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,466 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,467 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,468 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2018-12-24 14:02:10,470 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:10,515 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:10,515 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2018-12-24 14:02:10,550 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,552 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,553 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,554 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,555 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,556 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,557 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,559 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,561 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,562 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,562 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:10,563 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,564 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2018-12-24 14:02:10,565 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:10,617 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:10,617 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2018-12-24 14:02:10,647 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,648 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,651 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,652 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,653 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,654 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,655 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,656 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,657 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,658 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,659 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,660 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,662 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,663 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:10,663 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:10,664 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 125 [2018-12-24 14:02:10,665 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:10,716 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:10,716 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:47 [2018-12-24 14:02:10,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:10,743 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:10,797 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:10,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:10,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2018-12-24 14:02:10,816 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:10,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:02:10,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:02:10,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:02:10,817 INFO L87 Difference]: Start difference. First operand 948 states and 6467 transitions. Second operand 12 states. [2018-12-24 14:02:12,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:02:12,139 INFO L93 Difference]: Finished difference Result 1059 states and 6958 transitions. [2018-12-24 14:02:12,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:02:12,139 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-12-24 14:02:12,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:02:12,144 INFO L225 Difference]: With dead ends: 1059 [2018-12-24 14:02:12,144 INFO L226 Difference]: Without dead ends: 1057 [2018-12-24 14:02:12,144 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2018-12-24 14:02:12,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2018-12-24 14:02:12,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 945. [2018-12-24 14:02:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 945 states. [2018-12-24 14:02:12,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 6457 transitions. [2018-12-24 14:02:12,553 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 6457 transitions. Word has length 6 [2018-12-24 14:02:12,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:12,553 INFO L480 AbstractCegarLoop]: Abstraction has 945 states and 6457 transitions. [2018-12-24 14:02:12,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:02:12,553 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 6457 transitions. [2018-12-24 14:02:12,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:02:12,555 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:12,555 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:02:12,555 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:12,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:12,555 INFO L82 PathProgramCache]: Analyzing trace with hash 908367452, now seen corresponding path program 1 times [2018-12-24 14:02:12,555 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:12,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:12,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:12,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:12,556 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:12,630 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:12,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:12,631 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:12,631 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:02:12,631 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [22], [27] [2018-12-24 14:02:12,632 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:02:12,632 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:02:12,634 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:02:12,634 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:02:12,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:12,635 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:02:12,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:12,635 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 14:02:12,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:12,648 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:02:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:12,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:12,671 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:02:12,674 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:02:12,678 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,679 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:02:12,683 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,685 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,686 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,687 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:02:12,692 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,694 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,696 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,698 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,698 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:02:12,707 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:02:12,707 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:12,739 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:12,761 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:12,780 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:12,795 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:12,808 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:12,838 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,839 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:02:12,871 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,872 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,872 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:02:12,906 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,908 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,909 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,910 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,911 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:02:12,955 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,958 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,959 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,960 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,961 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:02:12,961 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:12,978 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:12,994 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:13,010 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:13,043 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:13,044 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:72, output treesize:71 [2018-12-24 14:02:13,108 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,109 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:02:13,109 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:13,139 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:13,139 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:50 [2018-12-24 14:02:13,170 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,171 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,171 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,172 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,172 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,173 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,175 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:02:13,175 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:13,205 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:13,206 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:38 [2018-12-24 14:02:13,231 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,232 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,233 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,234 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,235 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,236 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,237 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,239 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,240 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,240 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:13,241 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,242 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2018-12-24 14:02:13,243 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:13,278 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:13,278 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:34 [2018-12-24 14:02:13,301 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,301 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,302 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,303 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,305 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,306 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,307 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,308 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,309 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,310 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,311 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,312 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,312 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:13,313 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 100 [2018-12-24 14:02:13,314 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:13,347 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:13,348 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:38 [2018-12-24 14:02:13,368 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:13,369 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:13,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:13,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:13,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2018-12-24 14:02:13,448 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:13,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:02:13,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:02:13,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:02:13,448 INFO L87 Difference]: Start difference. First operand 945 states and 6457 transitions. Second operand 12 states. [2018-12-24 14:02:15,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:02:15,746 INFO L93 Difference]: Finished difference Result 1044 states and 6871 transitions. [2018-12-24 14:02:15,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:02:15,746 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-12-24 14:02:15,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:02:15,751 INFO L225 Difference]: With dead ends: 1044 [2018-12-24 14:02:15,751 INFO L226 Difference]: Without dead ends: 1042 [2018-12-24 14:02:15,751 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2018-12-24 14:02:15,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2018-12-24 14:02:16,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 982. [2018-12-24 14:02:16,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 982 states. [2018-12-24 14:02:16,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 6716 transitions. [2018-12-24 14:02:16,239 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 6716 transitions. Word has length 6 [2018-12-24 14:02:16,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:16,239 INFO L480 AbstractCegarLoop]: Abstraction has 982 states and 6716 transitions. [2018-12-24 14:02:16,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:02:16,240 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 6716 transitions. [2018-12-24 14:02:16,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:02:16,241 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:16,241 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:02:16,242 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:16,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:16,242 INFO L82 PathProgramCache]: Analyzing trace with hash 908371606, now seen corresponding path program 2 times [2018-12-24 14:02:16,242 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:16,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:16,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:16,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:16,243 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:16,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:16,358 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:16,359 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:02:16,359 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:02:16,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:16,359 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:02:16,368 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:02:16,368 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:02:16,374 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:02:16,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:02:16,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:16,396 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,397 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:02:16,437 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,439 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:02:16,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,482 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,484 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,485 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,486 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:02:16,539 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,540 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,541 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,542 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,544 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,545 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,545 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:02:16,609 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,611 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,612 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,613 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,614 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,615 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,616 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,618 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,618 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:02:16,619 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:16,645 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:16,672 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:16,700 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:16,728 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:16,765 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:02:16,768 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:02:16,771 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:02:16,774 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:02:16,778 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:02:16,780 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:02:16,780 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:16,815 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:16,836 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:16,852 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:16,866 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:16,878 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:16,927 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:16,928 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2018-12-24 14:02:16,972 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:02:16,974 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:17,019 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:17,019 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2018-12-24 14:02:17,059 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,063 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,064 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,065 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,066 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2018-12-24 14:02:17,066 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:17,113 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:17,114 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2018-12-24 14:02:17,147 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,149 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,150 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,151 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,152 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,154 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,155 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,156 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,157 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,158 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,160 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,161 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,162 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,162 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:17,163 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2018-12-24 14:02:17,164 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:17,216 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:17,217 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:49 [2018-12-24 14:02:17,245 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,245 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,246 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,247 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,249 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,250 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,251 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,252 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,253 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,254 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,255 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,256 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,257 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,258 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:17,259 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,260 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2018-12-24 14:02:17,260 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:17,310 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:17,310 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:43 [2018-12-24 14:02:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:17,334 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:17,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:17,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2018-12-24 14:02:17,413 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:17,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:02:17,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:02:17,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:02:17,413 INFO L87 Difference]: Start difference. First operand 982 states and 6716 transitions. Second operand 12 states. [2018-12-24 14:02:18,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:02:18,729 INFO L93 Difference]: Finished difference Result 1044 states and 6839 transitions. [2018-12-24 14:02:18,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:02:18,730 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-12-24 14:02:18,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:02:18,734 INFO L225 Difference]: With dead ends: 1044 [2018-12-24 14:02:18,734 INFO L226 Difference]: Without dead ends: 1041 [2018-12-24 14:02:18,734 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2018-12-24 14:02:18,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2018-12-24 14:02:19,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 980. [2018-12-24 14:02:19,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 980 states. [2018-12-24 14:02:19,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 6702 transitions. [2018-12-24 14:02:19,167 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 6702 transitions. Word has length 6 [2018-12-24 14:02:19,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:19,167 INFO L480 AbstractCegarLoop]: Abstraction has 980 states and 6702 transitions. [2018-12-24 14:02:19,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:02:19,167 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 6702 transitions. [2018-12-24 14:02:19,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:02:19,168 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:19,169 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:02:19,169 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:19,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:19,169 INFO L82 PathProgramCache]: Analyzing trace with hash 908017958, now seen corresponding path program 1 times [2018-12-24 14:02:19,169 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:19,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:19,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:02:19,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:19,170 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:19,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:19,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:19,241 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:19,241 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:02:19,241 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [22], [24], [27] [2018-12-24 14:02:19,242 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:02:19,242 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:02:19,243 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:02:19,243 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:02:19,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:19,244 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:02:19,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:19,244 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:02:19,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:19,253 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:02:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:19,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:19,419 WARN L181 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2018-12-24 14:02:19,433 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:02:19,447 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:02:19,467 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:19,468 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:19,468 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:02:19,471 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:19,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:19,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:19,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:02:19,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:19,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:19,482 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:19,483 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:19,484 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:02:19,492 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:02:19,493 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:19,522 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:19,546 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:19,564 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:19,577 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:19,591 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:19,619 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:19,619 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:02:19,652 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:19,653 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:19,653 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:02:19,689 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:19,691 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:19,692 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:19,693 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:19,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:02:19,738 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:19,739 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:19,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:19,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:19,743 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:19,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:19,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:02:19,745 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:19,779 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:19,795 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:19,812 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:19,845 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:19,845 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2018-12-24 14:02:19,949 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:19,959 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2018-12-24 14:02:19,959 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:02:20,069 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:02:20,070 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:106 [2018-12-24 14:02:20,193 WARN L181 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2018-12-24 14:02:20,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,202 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,203 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,204 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,209 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,211 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:20,221 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 93 [2018-12-24 14:02:20,222 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:02:20,374 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,376 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,377 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,378 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,379 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,380 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,380 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:20,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 80 [2018-12-24 14:02:20,382 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:20,469 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 3 xjuncts. [2018-12-24 14:02:20,470 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:126, output treesize:135 [2018-12-24 14:02:20,590 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,592 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,594 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,595 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,600 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,601 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,602 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,614 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 95 [2018-12-24 14:02:20,615 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:02:20,788 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,789 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,790 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,791 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,792 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,794 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,795 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,796 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,797 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 93 [2018-12-24 14:02:20,798 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:20,916 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,917 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,919 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,920 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,921 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,922 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,923 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,924 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,926 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 86 [2018-12-24 14:02:20,926 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:21,059 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 3 dim-1 vars, End of recursive call: 14 dim-0 vars, and 4 xjuncts. [2018-12-24 14:02:21,059 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 14 variables, input treesize:165, output treesize:147 [2018-12-24 14:02:21,190 WARN L181 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2018-12-24 14:02:21,195 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,196 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,197 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,200 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,202 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,204 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,205 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,206 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,207 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,209 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,210 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 102 [2018-12-24 14:02:21,211 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:21,335 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,336 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,336 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,337 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,339 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,341 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,342 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,343 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,347 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,348 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,352 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,353 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,354 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:21,355 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,371 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 118 [2018-12-24 14:02:21,373 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2018-12-24 14:02:21,646 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,647 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,648 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,650 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,652 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,653 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,654 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,655 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,656 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,657 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,659 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,659 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:21,660 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 92 [2018-12-24 14:02:21,660 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:21,812 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,813 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,814 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,815 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,817 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,818 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,819 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,820 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,821 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,822 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,824 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,825 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,825 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:21,826 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 98 [2018-12-24 14:02:21,827 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:21,962 INFO L267 ElimStorePlain]: Start of recursive call 1: 17 dim-0 vars, 4 dim-1 vars, End of recursive call: 25 dim-0 vars, and 6 xjuncts. [2018-12-24 14:02:21,963 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 21 variables, input treesize:190, output treesize:230 [2018-12-24 14:02:22,162 WARN L181 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 103 [2018-12-24 14:02:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:22,165 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:22,267 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:22,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:22,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2018-12-24 14:02:22,287 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:22,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:02:22,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:02:22,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:02:22,288 INFO L87 Difference]: Start difference. First operand 980 states and 6702 transitions. Second operand 12 states. [2018-12-24 14:02:22,478 WARN L181 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2018-12-24 14:02:22,752 WARN L181 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2018-12-24 14:02:23,163 WARN L181 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2018-12-24 14:02:23,610 WARN L181 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2018-12-24 14:02:24,120 WARN L181 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 85 [2018-12-24 14:02:24,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:02:24,996 INFO L93 Difference]: Finished difference Result 1104 states and 7131 transitions. [2018-12-24 14:02:24,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:02:24,996 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-12-24 14:02:24,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:02:25,001 INFO L225 Difference]: With dead ends: 1104 [2018-12-24 14:02:25,002 INFO L226 Difference]: Without dead ends: 1102 [2018-12-24 14:02:25,002 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2018-12-24 14:02:25,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2018-12-24 14:02:25,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 984. [2018-12-24 14:02:25,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2018-12-24 14:02:25,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 6730 transitions. [2018-12-24 14:02:25,441 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 6730 transitions. Word has length 6 [2018-12-24 14:02:25,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:25,441 INFO L480 AbstractCegarLoop]: Abstraction has 984 states and 6730 transitions. [2018-12-24 14:02:25,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:02:25,441 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 6730 transitions. [2018-12-24 14:02:25,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:02:25,442 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:25,443 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:02:25,443 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:25,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:25,443 INFO L82 PathProgramCache]: Analyzing trace with hash 908017524, now seen corresponding path program 1 times [2018-12-24 14:02:25,443 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:25,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:25,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:25,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:25,444 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:25,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:25,535 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:25,535 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:02:25,535 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [22], [27] [2018-12-24 14:02:25,536 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:02:25,536 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:02:25,537 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:02:25,537 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:02:25,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:25,538 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:02:25,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:25,538 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:02:25,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:25,547 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:02:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:25,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:25,574 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:25,574 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:02:25,607 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:25,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:25,609 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:02:25,645 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:25,646 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:25,648 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:25,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:25,650 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:02:25,694 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:25,695 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:25,696 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:25,698 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:25,700 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:25,702 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:25,702 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:02:25,703 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:25,727 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:25,749 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:25,772 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:25,804 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:02:25,806 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:02:25,809 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:02:25,813 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:02:25,816 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:02:25,823 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:02:25,823 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:25,850 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:25,871 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:25,887 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:25,901 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:25,911 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:25,945 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:25,945 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2018-12-24 14:02:25,999 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:25,999 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:02:26,000 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:26,030 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:26,031 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2018-12-24 14:02:26,059 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,063 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,064 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:26,065 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2018-12-24 14:02:26,065 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:26,093 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:26,093 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:42 [2018-12-24 14:02:26,117 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,117 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,122 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,123 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,124 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,125 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,126 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:02:26,126 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:26,156 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:26,157 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:34 [2018-12-24 14:02:26,179 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,181 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,182 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,183 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,184 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,186 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,187 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,188 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,189 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,190 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,191 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:26,192 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:26,193 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 93 [2018-12-24 14:02:26,193 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:26,229 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:26,229 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:34 [2018-12-24 14:02:26,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:26,249 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:26,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:26,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2018-12-24 14:02:26,313 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:26,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:02:26,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:02:26,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:02:26,314 INFO L87 Difference]: Start difference. First operand 984 states and 6730 transitions. Second operand 12 states. [2018-12-24 14:02:28,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:02:28,959 INFO L93 Difference]: Finished difference Result 1313 states and 8698 transitions. [2018-12-24 14:02:28,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-24 14:02:28,960 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-12-24 14:02:28,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:02:28,965 INFO L225 Difference]: With dead ends: 1313 [2018-12-24 14:02:28,965 INFO L226 Difference]: Without dead ends: 1312 [2018-12-24 14:02:28,966 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2018-12-24 14:02:28,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2018-12-24 14:02:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 839. [2018-12-24 14:02:29,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 839 states. [2018-12-24 14:02:29,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 5721 transitions. [2018-12-24 14:02:29,444 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 5721 transitions. Word has length 6 [2018-12-24 14:02:29,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:29,444 INFO L480 AbstractCegarLoop]: Abstraction has 839 states and 5721 transitions. [2018-12-24 14:02:29,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:02:29,444 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 5721 transitions. [2018-12-24 14:02:29,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:02:29,446 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:29,446 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:02:29,446 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:29,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:29,446 INFO L82 PathProgramCache]: Analyzing trace with hash 908550478, now seen corresponding path program 1 times [2018-12-24 14:02:29,446 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:29,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:29,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:29,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:29,447 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:29,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:29,500 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:29,500 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:02:29,500 INFO L207 CegarAbsIntRunner]: [0], [14], [22], [24], [28], [29] [2018-12-24 14:02:29,502 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:02:29,502 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:02:29,503 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:02:29,504 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:02:29,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:29,504 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:02:29,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:29,504 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:02:29,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:29,515 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:02:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:29,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:29,524 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:02:29,531 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:02:29,543 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:29,544 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:29,544 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:02:29,549 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:29,550 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:29,552 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:29,552 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:02:29,556 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:29,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:29,559 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:29,560 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:29,561 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:02:29,565 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:29,566 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:29,568 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:29,570 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:29,571 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:29,572 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:02:29,573 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:30,042 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:30,307 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:30,498 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:30,661 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:30,824 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:31,090 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2018-12-24 14:02:31,251 WARN L181 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-12-24 14:02:31,286 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,309 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,310 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2018-12-24 14:02:31,350 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,351 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,353 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,354 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,357 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2018-12-24 14:02:31,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,404 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,408 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,410 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,411 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:02:31,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,474 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,475 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,476 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,482 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,483 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:02:31,483 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:31,509 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:31,534 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:31,559 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:31,587 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:31,631 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:31,631 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2018-12-24 14:02:31,728 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,729 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2018-12-24 14:02:31,729 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:31,770 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:31,771 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2018-12-24 14:02:31,802 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,803 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,805 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,806 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,811 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,812 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,813 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 107 [2018-12-24 14:02:31,813 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:31,861 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:31,861 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:51 [2018-12-24 14:02:31,931 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,949 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,950 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,950 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,951 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,952 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,952 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,953 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,954 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,958 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,959 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:31,960 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:31,961 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 119 [2018-12-24 14:02:31,961 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:32,009 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:32,009 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:45 [2018-12-24 14:02:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:32,033 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:32,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:32,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:32,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:02:32,093 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:32,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:02:32,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:02:32,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:02:32,094 INFO L87 Difference]: Start difference. First operand 839 states and 5721 transitions. Second operand 10 states. [2018-12-24 14:02:33,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:02:33,102 INFO L93 Difference]: Finished difference Result 881 states and 5780 transitions. [2018-12-24 14:02:33,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:02:33,103 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:02:33,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:02:33,106 INFO L225 Difference]: With dead ends: 881 [2018-12-24 14:02:33,106 INFO L226 Difference]: Without dead ends: 880 [2018-12-24 14:02:33,106 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:02:33,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2018-12-24 14:02:33,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 841. [2018-12-24 14:02:33,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 841 states. [2018-12-24 14:02:33,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 5735 transitions. [2018-12-24 14:02:33,571 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 5735 transitions. Word has length 6 [2018-12-24 14:02:33,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:33,571 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 5735 transitions. [2018-12-24 14:02:33,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:02:33,571 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 5735 transitions. [2018-12-24 14:02:33,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:02:33,572 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:33,573 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:02:33,573 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:33,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:33,573 INFO L82 PathProgramCache]: Analyzing trace with hash 908133404, now seen corresponding path program 1 times [2018-12-24 14:02:33,573 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:33,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:33,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:33,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:33,574 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:33,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:33,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:33,671 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:33,672 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:02:33,672 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [22], [28], [29] [2018-12-24 14:02:33,673 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:02:33,673 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:02:33,675 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:02:33,675 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:02:33,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:33,675 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:02:33,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:33,676 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 14:02:33,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:33,684 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:02:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:33,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:33,698 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:02:33,702 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:02:33,706 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:33,708 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:33,708 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:02:33,712 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:33,713 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:33,715 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:33,715 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:02:33,719 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:33,720 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:33,721 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:33,722 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:33,723 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:02:33,732 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:02:33,733 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:33,759 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:33,778 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:33,795 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:33,808 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:33,821 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:33,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:02:33,858 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:33,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:33,861 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:02:33,894 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:33,895 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:33,897 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:33,898 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:33,899 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:02:33,938 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:33,940 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:33,941 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:33,942 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:33,943 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:33,945 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:33,946 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:02:33,946 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:33,960 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:33,974 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:33,991 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:34,022 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:34,022 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2018-12-24 14:02:34,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:34,063 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2018-12-24 14:02:34,063 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:34,090 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:34,090 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2018-12-24 14:02:34,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:34,114 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:34,114 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:34,115 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:34,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:34,119 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:34,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:34,129 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 86 [2018-12-24 14:02:34,130 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:02:34,229 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:02:34,230 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:72 [2018-12-24 14:02:34,269 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:34,270 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:34,271 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:34,272 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:34,273 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:34,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:34,275 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:34,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:34,277 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:34,278 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 77 [2018-12-24 14:02:34,278 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:34,299 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:34,299 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:27 [2018-12-24 14:02:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:34,315 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:34,358 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:34,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:02:34,358 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:34,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:02:34,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:02:34,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:02:34,359 INFO L87 Difference]: Start difference. First operand 841 states and 5735 transitions. Second operand 10 states. [2018-12-24 14:02:35,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:02:35,651 INFO L93 Difference]: Finished difference Result 1415 states and 9444 transitions. [2018-12-24 14:02:35,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:02:35,651 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:02:35,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:02:35,656 INFO L225 Difference]: With dead ends: 1415 [2018-12-24 14:02:35,656 INFO L226 Difference]: Without dead ends: 1413 [2018-12-24 14:02:35,657 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:02:35,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2018-12-24 14:02:36,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1280. [2018-12-24 14:02:36,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1280 states. [2018-12-24 14:02:36,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 8838 transitions. [2018-12-24 14:02:36,479 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 8838 transitions. Word has length 6 [2018-12-24 14:02:36,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:36,479 INFO L480 AbstractCegarLoop]: Abstraction has 1280 states and 8838 transitions. [2018-12-24 14:02:36,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:02:36,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 8838 transitions. [2018-12-24 14:02:36,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:02:36,482 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:36,482 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:02:36,483 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:36,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:36,483 INFO L82 PathProgramCache]: Analyzing trace with hash 909988134, now seen corresponding path program 1 times [2018-12-24 14:02:36,483 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:36,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:36,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:36,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:36,484 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:36,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:36,553 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:36,553 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:02:36,553 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [24], [28], [29] [2018-12-24 14:02:36,554 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:02:36,554 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:02:36,555 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:02:36,555 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:02:36,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:36,556 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:02:36,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:36,556 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:02:36,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:36,564 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:02:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:36,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:36,573 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:02:36,585 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,588 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:02:36,718 WARN L181 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2018-12-24 14:02:36,722 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,726 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,727 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,728 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:02:36,768 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,769 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,770 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,771 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,773 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,775 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,775 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:02:36,776 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:36,792 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:36,807 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:36,824 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:36,848 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:02:36,852 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:02:36,856 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:02:36,860 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:02:36,864 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:02:36,872 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:02:36,872 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:36,896 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:36,915 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:36,929 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:36,941 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:36,953 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:36,984 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:36,984 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2018-12-24 14:02:37,196 WARN L181 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2018-12-24 14:02:37,213 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:37,252 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 87 [2018-12-24 14:02:37,259 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 32 xjuncts. [2018-12-24 14:02:37,619 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 21 dim-0 vars, and 7 xjuncts. [2018-12-24 14:02:37,620 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:425 [2018-12-24 14:02:37,779 WARN L181 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 90 [2018-12-24 14:02:37,785 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:37,786 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:37,787 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:37,788 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:37,789 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 69 [2018-12-24 14:02:37,790 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:37,888 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:37,889 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:37,890 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:37,892 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:37,893 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:37,894 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:37,895 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:37,904 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 87 [2018-12-24 14:02:37,905 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-12-24 14:02:38,051 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:38,053 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:38,054 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:38,055 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:38,058 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:38,059 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:38,068 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 93 [2018-12-24 14:02:38,069 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2018-12-24 14:02:38,237 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 3 dim-1 vars, End of recursive call: 12 dim-0 vars, and 5 xjuncts. [2018-12-24 14:02:38,237 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 11 variables, input treesize:194, output treesize:184 [2018-12-24 14:02:38,343 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:38,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:38,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:38,345 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:38,346 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:38,347 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:38,348 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 75 [2018-12-24 14:02:38,349 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:38,416 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:38,417 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:38,419 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:38,420 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:38,421 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:38,422 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:38,423 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:38,423 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 69 [2018-12-24 14:02:38,424 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:38,477 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:38,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:38,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:38,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:38,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:38,482 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:38,483 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 57 [2018-12-24 14:02:38,483 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:38,530 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 3 dim-1 vars, End of recursive call: 9 dim-0 vars, and 3 xjuncts. [2018-12-24 14:02:38,530 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 12 variables, input treesize:132, output treesize:92 [2018-12-24 14:02:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:38,623 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:38,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:38,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:38,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:02:38,689 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:38,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:02:38,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:02:38,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:02:38,690 INFO L87 Difference]: Start difference. First operand 1280 states and 8838 transitions. Second operand 10 states. [2018-12-24 14:02:39,164 WARN L181 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2018-12-24 14:02:40,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:02:40,676 INFO L93 Difference]: Finished difference Result 1381 states and 9127 transitions. [2018-12-24 14:02:40,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:02:40,676 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:02:40,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:02:40,681 INFO L225 Difference]: With dead ends: 1381 [2018-12-24 14:02:40,681 INFO L226 Difference]: Without dead ends: 1379 [2018-12-24 14:02:40,681 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2018-12-24 14:02:40,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2018-12-24 14:02:41,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1274. [2018-12-24 14:02:41,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1274 states. [2018-12-24 14:02:41,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 8796 transitions. [2018-12-24 14:02:41,460 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 8796 transitions. Word has length 6 [2018-12-24 14:02:41,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:41,460 INFO L480 AbstractCegarLoop]: Abstraction has 1274 states and 8796 transitions. [2018-12-24 14:02:41,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:02:41,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 8796 transitions. [2018-12-24 14:02:41,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:02:41,463 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:41,463 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:02:41,463 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:41,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:41,464 INFO L82 PathProgramCache]: Analyzing trace with hash 909993964, now seen corresponding path program 1 times [2018-12-24 14:02:41,464 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:41,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:41,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:41,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:41,464 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:02:41,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:41,525 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:41,525 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:02:41,526 INFO L207 CegarAbsIntRunner]: [0], [10], [24], [28], [30], [31] [2018-12-24 14:02:41,526 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:02:41,527 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:02:41,528 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:02:41,528 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:02:41,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:41,529 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:02:41,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:41,529 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:02:41,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:41,545 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:02:41,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:41,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:41,554 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2018-12-24 14:02:41,570 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:41,572 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:41,573 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2018-12-24 14:02:41,621 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:41,622 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:41,624 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:41,626 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:41,626 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2018-12-24 14:02:41,696 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:41,697 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:41,698 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:41,700 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:41,701 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:41,703 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:41,704 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:02:41,761 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:41,763 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:41,764 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:41,765 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:41,766 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:41,767 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:41,769 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:41,771 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:41,772 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:02:41,772 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:41,804 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:41,829 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:41,855 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:41,881 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:41,916 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:02:41,920 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:02:41,923 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:02:41,947 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:02:41,950 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:02:41,953 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:02:41,954 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:41,988 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:42,007 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:42,022 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:42,034 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:42,046 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:42,090 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:42,090 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2018-12-24 14:02:42,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,119 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2018-12-24 14:02:42,119 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:42,163 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:42,163 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2018-12-24 14:02:42,186 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,188 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,189 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,190 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,191 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,194 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,195 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,196 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:42,205 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 112 [2018-12-24 14:02:42,206 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:02:42,354 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2018-12-24 14:02:42,354 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:79, output treesize:110 [2018-12-24 14:02:44,420 WARN L181 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2018-12-24 14:02:44,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:44,424 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:44,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:44,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:44,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:02:44,466 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:44,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:02:44,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:02:44,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:02:44,466 INFO L87 Difference]: Start difference. First operand 1274 states and 8796 transitions. Second operand 8 states. [2018-12-24 14:02:45,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:02:45,646 INFO L93 Difference]: Finished difference Result 1306 states and 8833 transitions. [2018-12-24 14:02:45,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:02:45,647 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2018-12-24 14:02:45,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:02:45,651 INFO L225 Difference]: With dead ends: 1306 [2018-12-24 14:02:45,652 INFO L226 Difference]: Without dead ends: 1305 [2018-12-24 14:02:45,652 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:02:45,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2018-12-24 14:02:46,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 1274. [2018-12-24 14:02:46,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1274 states. [2018-12-24 14:02:46,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 8796 transitions. [2018-12-24 14:02:46,461 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 8796 transitions. Word has length 6 [2018-12-24 14:02:46,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:46,461 INFO L480 AbstractCegarLoop]: Abstraction has 1274 states and 8796 transitions. [2018-12-24 14:02:46,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:02:46,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 8796 transitions. [2018-12-24 14:02:46,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:02:46,464 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:46,464 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:02:46,464 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:46,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:46,464 INFO L82 PathProgramCache]: Analyzing trace with hash 909980134, now seen corresponding path program 1 times [2018-12-24 14:02:46,465 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:46,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:46,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:46,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:46,465 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:46,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:46,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:46,592 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:46,592 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:02:46,593 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [24], [27] [2018-12-24 14:02:46,594 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:02:46,594 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:02:46,596 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:02:46,597 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:02:46,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:46,597 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:02:46,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:46,597 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:02:46,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:46,611 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:02:46,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:46,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:46,639 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:46,640 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:02:46,680 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:46,681 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:46,682 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:02:46,725 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:46,726 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:46,728 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:46,729 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:46,729 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:02:46,783 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:46,783 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:46,784 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:46,786 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:46,787 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:46,788 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:46,789 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:02:46,853 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:46,854 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:46,856 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:46,857 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:46,858 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:46,859 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:46,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:46,861 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:46,862 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:02:46,863 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:46,890 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:46,918 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:46,945 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:46,973 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:47,009 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:02:47,012 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:02:47,036 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:02:47,039 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:02:47,041 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:02:47,045 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:02:47,045 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:47,082 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:47,103 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:47,119 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:47,132 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:47,145 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:47,190 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:47,191 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2018-12-24 14:02:47,236 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,236 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:02:47,237 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:47,281 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:47,282 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2018-12-24 14:02:47,318 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,319 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,321 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,322 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,324 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,325 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,325 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:47,326 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 112 [2018-12-24 14:02:47,327 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:47,375 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:47,376 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:59 [2018-12-24 14:02:47,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,408 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,409 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,410 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,411 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,412 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,413 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,414 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,415 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,416 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,417 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,418 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 115 [2018-12-24 14:02:47,419 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:47,468 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:47,468 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:73, output treesize:51 [2018-12-24 14:02:47,501 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,502 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,503 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,504 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,505 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,507 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,508 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,509 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,510 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,511 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,512 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,513 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,514 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,515 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,516 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:47,517 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:47,518 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 120 [2018-12-24 14:02:47,518 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:47,566 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:47,567 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2018-12-24 14:02:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:47,597 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:47,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:47,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2018-12-24 14:02:47,679 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:47,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:02:47,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:02:47,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:02:47,679 INFO L87 Difference]: Start difference. First operand 1274 states and 8796 transitions. Second operand 12 states. [2018-12-24 14:02:49,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:02:49,275 INFO L93 Difference]: Finished difference Result 1360 states and 9097 transitions. [2018-12-24 14:02:49,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:02:49,275 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-12-24 14:02:49,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:02:49,281 INFO L225 Difference]: With dead ends: 1360 [2018-12-24 14:02:49,281 INFO L226 Difference]: Without dead ends: 1358 [2018-12-24 14:02:49,282 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2018-12-24 14:02:49,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2018-12-24 14:02:50,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1309. [2018-12-24 14:02:50,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1309 states. [2018-12-24 14:02:50,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 9030 transitions. [2018-12-24 14:02:50,035 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 9030 transitions. Word has length 6 [2018-12-24 14:02:50,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:50,036 INFO L480 AbstractCegarLoop]: Abstraction has 1309 states and 9030 transitions. [2018-12-24 14:02:50,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:02:50,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 9030 transitions. [2018-12-24 14:02:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:02:50,038 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:50,038 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:02:50,038 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:50,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:50,039 INFO L82 PathProgramCache]: Analyzing trace with hash 896939676, now seen corresponding path program 2 times [2018-12-24 14:02:50,039 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:50,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:50,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:50,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:50,039 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:02:50,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:50,213 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:50,213 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:02:50,213 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:02:50,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:50,214 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:02:50,222 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:02:50,222 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:02:50,229 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:02:50,229 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:02:50,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:50,255 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:50,256 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:02:50,296 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:50,297 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:50,297 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:02:50,336 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:50,338 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:50,339 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:50,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:50,341 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:02:50,395 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:50,396 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:50,396 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:50,397 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:50,398 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:50,400 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:50,400 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:02:50,466 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:50,467 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:50,467 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:50,468 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:50,470 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:50,471 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:50,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:50,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:50,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:02:50,474 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:50,502 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:50,858 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:50,902 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:50,931 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:50,965 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:02:50,968 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:02:50,969 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:02:50,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:02:50,976 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:02:50,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:02:50,978 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:51,056 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:51,076 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:51,092 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:51,106 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:51,118 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:51,165 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:51,165 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2018-12-24 14:02:51,193 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:51,193 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:02:51,194 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:51,242 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:51,242 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:02:51,266 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:51,266 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:51,267 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:51,268 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:51,269 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:51,270 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:51,271 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:51,272 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:51,273 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:02:51,274 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:51,324 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:51,324 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2018-12-24 14:02:51,349 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:51,350 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:51,351 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:51,352 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:51,353 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:51,354 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:51,355 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:51,357 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:51,358 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:51,359 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:51,360 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:51,361 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:51,362 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:51,363 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:51,364 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2018-12-24 14:02:51,364 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:51,414 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:51,414 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:49 [2018-12-24 14:02:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:51,435 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:51,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:51,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:02:51,490 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:51,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:02:51,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:02:51,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:02:51,491 INFO L87 Difference]: Start difference. First operand 1309 states and 9030 transitions. Second operand 10 states. [2018-12-24 14:02:53,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:02:53,305 INFO L93 Difference]: Finished difference Result 1898 states and 12744 transitions. [2018-12-24 14:02:53,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:02:53,306 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:02:53,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:02:53,312 INFO L225 Difference]: With dead ends: 1898 [2018-12-24 14:02:53,312 INFO L226 Difference]: Without dead ends: 1896 [2018-12-24 14:02:53,312 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:02:53,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2018-12-24 14:02:54,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1669. [2018-12-24 14:02:54,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1669 states. [2018-12-24 14:02:54,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 11590 transitions. [2018-12-24 14:02:54,490 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 11590 transitions. Word has length 6 [2018-12-24 14:02:54,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:54,490 INFO L480 AbstractCegarLoop]: Abstraction has 1669 states and 11590 transitions. [2018-12-24 14:02:54,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:02:54,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 11590 transitions. [2018-12-24 14:02:54,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:02:54,495 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:54,495 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:02:54,495 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:54,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:54,495 INFO L82 PathProgramCache]: Analyzing trace with hash 897602894, now seen corresponding path program 1 times [2018-12-24 14:02:54,495 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:54,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:54,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:02:54,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:54,496 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:54,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:02:54,580 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 14:02:54,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-24 14:02:54,581 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:02:54,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-24 14:02:54,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-24 14:02:54,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-24 14:02:54,581 INFO L87 Difference]: Start difference. First operand 1669 states and 11590 transitions. Second operand 5 states. [2018-12-24 14:02:55,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:02:55,863 INFO L93 Difference]: Finished difference Result 1693 states and 11616 transitions. [2018-12-24 14:02:55,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-24 14:02:55,863 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2018-12-24 14:02:55,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:02:55,868 INFO L225 Difference]: With dead ends: 1693 [2018-12-24 14:02:55,868 INFO L226 Difference]: Without dead ends: 1692 [2018-12-24 14:02:55,869 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-12-24 14:02:55,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2018-12-24 14:02:56,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1672. [2018-12-24 14:02:56,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2018-12-24 14:02:56,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 11593 transitions. [2018-12-24 14:02:56,966 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 11593 transitions. Word has length 6 [2018-12-24 14:02:56,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:56,966 INFO L480 AbstractCegarLoop]: Abstraction has 1672 states and 11593 transitions. [2018-12-24 14:02:56,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-24 14:02:56,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 11593 transitions. [2018-12-24 14:02:56,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:02:56,969 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:56,969 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:02:56,969 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:56,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:56,969 INFO L82 PathProgramCache]: Analyzing trace with hash 900997082, now seen corresponding path program 1 times [2018-12-24 14:02:56,969 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:56,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:56,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:56,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:56,970 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:57,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:57,009 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:57,010 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:02:57,010 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [28], [30], [31] [2018-12-24 14:02:57,010 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:02:57,010 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:02:57,012 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:02:57,012 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:02:57,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:57,012 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:02:57,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:57,012 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:02:57,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:57,020 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:02:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:57,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:57,028 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:02:57,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:02:57,037 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,039 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:02:57,044 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,045 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,046 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,046 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:02:57,050 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,052 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,053 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,054 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,055 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:02:57,059 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,064 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,065 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,066 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:02:57,066 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:57,107 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:57,129 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:57,146 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:57,161 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:57,175 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:57,204 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2018-12-24 14:02:57,225 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,226 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,227 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2018-12-24 14:02:57,266 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,267 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,269 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,271 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,271 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2018-12-24 14:02:57,318 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,321 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,322 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,324 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,326 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,327 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:02:57,388 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,389 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,390 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,391 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,395 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,396 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,397 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,397 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:02:57,398 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:57,422 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:57,448 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:57,474 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:57,503 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:57,551 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:57,552 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:84, output treesize:87 [2018-12-24 14:02:57,577 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,578 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2018-12-24 14:02:57,578 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:57,625 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:57,625 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2018-12-24 14:02:57,647 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,648 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,651 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,653 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,654 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,655 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,657 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,658 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:57,659 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 99 [2018-12-24 14:02:57,660 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:57,706 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:57,706 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:77, output treesize:51 [2018-12-24 14:02:57,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:57,728 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:57,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:57,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:57,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:02:57,757 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:57,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:02:57,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:02:57,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:02:57,757 INFO L87 Difference]: Start difference. First operand 1672 states and 11593 transitions. Second operand 8 states. [2018-12-24 14:03:00,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:03:00,072 INFO L93 Difference]: Finished difference Result 2759 states and 18997 transitions. [2018-12-24 14:03:00,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:03:00,072 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2018-12-24 14:03:00,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:03:00,081 INFO L225 Difference]: With dead ends: 2759 [2018-12-24 14:03:00,081 INFO L226 Difference]: Without dead ends: 2757 [2018-12-24 14:03:00,082 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:03:00,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2018-12-24 14:03:02,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 2639. [2018-12-24 14:03:02,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2639 states. [2018-12-24 14:03:02,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2639 states to 2639 states and 18434 transitions. [2018-12-24 14:03:02,080 INFO L78 Accepts]: Start accepts. Automaton has 2639 states and 18434 transitions. Word has length 6 [2018-12-24 14:03:02,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:03:02,080 INFO L480 AbstractCegarLoop]: Abstraction has 2639 states and 18434 transitions. [2018-12-24 14:03:02,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:03:02,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2639 states and 18434 transitions. [2018-12-24 14:03:02,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:03:02,084 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:03:02,084 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:03:02,084 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:03:02,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:03:02,084 INFO L82 PathProgramCache]: Analyzing trace with hash 900629790, now seen corresponding path program 1 times [2018-12-24 14:03:02,085 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:03:02,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:02,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:03:02,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:02,085 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:03:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:03:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:03:02,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:02,264 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:03:02,264 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:03:02,264 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [24], [27] [2018-12-24 14:03:02,265 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:03:02,265 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:03:02,267 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:03:02,267 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:03:02,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:03:02,267 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:03:02,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:02,267 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 14:03:02,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:03:02,278 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:03:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:03:02,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:03:02,320 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:03:02,323 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:03:02,326 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,327 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,328 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:03:02,331 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,332 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,334 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,334 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:03:02,338 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,339 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,341 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,342 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:03:02,346 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,347 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,348 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,350 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,351 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,352 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:03:02,352 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:02,391 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:02,415 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:02,434 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:02,450 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:02,464 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:02,498 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,499 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:03:02,539 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,540 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,541 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:03:02,584 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,585 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,586 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,588 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:03:02,637 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,639 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,640 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,641 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,642 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,643 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,644 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:03:02,710 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,712 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,713 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,714 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,715 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,716 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,717 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,718 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,719 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:03:02,720 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:02,746 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:02,772 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:02,799 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:02,823 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:02,869 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:02,870 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:03:02,908 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,909 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:03:02,909 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:02,955 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:02,955 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:03:02,987 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,989 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,990 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,991 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,992 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,993 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,994 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:02,995 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:03:02,995 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2018-12-24 14:03:02,996 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:03,042 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:03,043 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:59 [2018-12-24 14:03:03,070 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:03,071 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:03,073 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:03,074 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:03,075 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:03,076 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:03,077 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:03,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:03,080 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:03,081 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:03,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:03,083 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2018-12-24 14:03:03,084 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:03,130 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:03,131 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:69, output treesize:47 [2018-12-24 14:03:03,157 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:03,158 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:03,158 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:03,159 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:03,160 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:03,162 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:03,163 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:03,164 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:03,165 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:03,166 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:03,167 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:03,168 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:03,169 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:03,170 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:03:03,171 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:03,172 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2018-12-24 14:03:03,172 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:03,224 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:03,224 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:43 [2018-12-24 14:03:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:03:03,246 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:03:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:03:03,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:03:03,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2018-12-24 14:03:03,313 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:03:03,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:03:03,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:03:03,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:03:03,313 INFO L87 Difference]: Start difference. First operand 2639 states and 18434 transitions. Second operand 12 states. [2018-12-24 14:03:07,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:03:07,203 INFO L93 Difference]: Finished difference Result 3636 states and 24951 transitions. [2018-12-24 14:03:07,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-24 14:03:07,203 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-12-24 14:03:07,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:03:07,215 INFO L225 Difference]: With dead ends: 3636 [2018-12-24 14:03:07,215 INFO L226 Difference]: Without dead ends: 3626 [2018-12-24 14:03:07,216 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2018-12-24 14:03:07,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3626 states. [2018-12-24 14:03:09,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3626 to 2790. [2018-12-24 14:03:09,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2790 states. [2018-12-24 14:03:09,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 19490 transitions. [2018-12-24 14:03:09,798 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 19490 transitions. Word has length 6 [2018-12-24 14:03:09,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:03:09,799 INFO L480 AbstractCegarLoop]: Abstraction has 2790 states and 19490 transitions. [2018-12-24 14:03:09,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:03:09,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 19490 transitions. [2018-12-24 14:03:09,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:03:09,803 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:03:09,803 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:03:09,803 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:03:09,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:03:09,803 INFO L82 PathProgramCache]: Analyzing trace with hash 900752924, now seen corresponding path program 2 times [2018-12-24 14:03:09,803 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:03:09,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:09,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:03:09,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:09,804 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:03:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:03:09,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:03:09,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:09,853 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:03:09,853 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:03:09,854 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:03:09,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:09,854 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:03:09,862 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:03:09,862 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:03:09,868 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:03:09,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:03:09,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:03:09,874 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:03:09,877 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:03:09,882 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:09,883 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:09,884 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:03:09,889 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:09,890 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:09,890 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:09,891 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:03:09,895 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:09,898 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:09,899 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:09,901 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:09,901 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:03:09,905 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:09,906 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:09,909 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:09,910 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:09,911 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:09,912 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:03:09,913 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:09,952 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:09,973 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:09,991 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:10,005 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:10,019 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:10,048 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2018-12-24 14:03:10,065 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,067 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,068 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2018-12-24 14:03:10,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,107 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,109 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,110 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,111 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2018-12-24 14:03:10,159 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,160 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,161 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,163 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,164 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,166 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,167 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:03:10,225 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,226 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,227 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,229 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,231 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,232 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,233 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,234 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,235 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:03:10,235 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:10,260 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:10,285 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:10,308 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:10,335 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:10,379 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:10,380 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2018-12-24 14:03:10,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,408 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2018-12-24 14:03:10,409 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:10,454 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:10,454 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2018-12-24 14:03:10,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,483 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,485 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,486 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,487 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,488 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,498 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:03:10,499 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:03:10,649 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:03:10,650 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:98 [2018-12-24 14:03:10,711 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,712 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,713 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,713 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,714 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,715 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,716 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,717 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,718 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,719 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:10,720 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:03:10,721 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 14:03:10,721 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:10,760 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:10,761 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:54, output treesize:36 [2018-12-24 14:03:10,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:03:10,778 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:03:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:03:10,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:03:10,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:03:10,838 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:03:10,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:03:10,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:03:10,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:03:10,838 INFO L87 Difference]: Start difference. First operand 2790 states and 19490 transitions. Second operand 10 states. [2018-12-24 14:03:15,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:03:15,336 INFO L93 Difference]: Finished difference Result 4300 states and 29900 transitions. [2018-12-24 14:03:15,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:03:15,336 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:03:15,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:03:15,350 INFO L225 Difference]: With dead ends: 4300 [2018-12-24 14:03:15,351 INFO L226 Difference]: Without dead ends: 4298 [2018-12-24 14:03:15,352 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:03:15,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2018-12-24 14:03:19,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 4076. [2018-12-24 14:03:19,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4076 states. [2018-12-24 14:03:19,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4076 states to 4076 states and 28660 transitions. [2018-12-24 14:03:19,274 INFO L78 Accepts]: Start accepts. Automaton has 4076 states and 28660 transitions. Word has length 6 [2018-12-24 14:03:19,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:03:19,275 INFO L480 AbstractCegarLoop]: Abstraction has 4076 states and 28660 transitions. [2018-12-24 14:03:19,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:03:19,275 INFO L276 IsEmpty]: Start isEmpty. Operand 4076 states and 28660 transitions. [2018-12-24 14:03:19,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:03:19,281 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:03:19,281 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:03:19,281 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:03:19,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:03:19,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2030611754, now seen corresponding path program 1 times [2018-12-24 14:03:19,281 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:03:19,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:19,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:03:19,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:19,282 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:03:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:03:19,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:03:19,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:19,349 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:03:19,349 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:03:19,349 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [22], [24], [28], [29] [2018-12-24 14:03:19,350 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:03:19,350 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:03:19,352 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:03:19,352 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:03:19,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:03:19,352 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:03:19,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:19,352 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 14:03:19,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:03:19,361 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:03:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:03:19,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:03:19,387 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:03:19,391 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:03:19,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,395 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,395 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:03:19,399 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,399 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,400 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,401 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:03:19,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,408 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,409 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:03:19,413 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,414 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,414 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,415 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,416 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,417 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:03:19,418 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:19,460 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:19,484 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:19,503 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:19,516 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:19,530 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:19,565 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,566 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:03:19,618 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,619 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,620 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:03:19,661 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,663 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,664 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,665 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,666 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:03:19,719 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,721 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,722 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,724 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,725 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,726 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:03:19,791 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,792 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,794 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,795 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,796 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,798 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,799 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,800 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:03:19,800 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:19,827 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:19,853 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:19,880 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:19,907 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:19,954 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:19,954 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2018-12-24 14:03:19,999 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:19,999 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:03:19,999 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:20,042 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:20,042 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2018-12-24 14:03:20,077 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,080 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,081 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,083 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,084 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,085 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,086 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:03:20,087 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:20,135 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:20,136 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2018-12-24 14:03:20,167 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,168 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,169 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,170 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,171 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,172 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,173 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,175 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,177 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,178 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,179 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,180 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,181 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,181 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:03:20,182 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 119 [2018-12-24 14:03:20,183 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:20,233 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:20,234 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:49 [2018-12-24 14:03:20,279 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,280 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,284 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,285 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,286 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,288 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,289 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,290 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,291 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,293 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,294 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,294 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:03:20,295 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:20,296 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2018-12-24 14:03:20,297 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:20,346 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:20,347 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:43 [2018-12-24 14:03:20,372 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:03:20,372 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:03:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:03:20,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:03:20,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2018-12-24 14:03:20,449 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:03:20,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-24 14:03:20,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-24 14:03:20,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:03:20,449 INFO L87 Difference]: Start difference. First operand 4076 states and 28660 transitions. Second operand 11 states. [2018-12-24 14:03:25,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:03:25,144 INFO L93 Difference]: Finished difference Result 4236 states and 29539 transitions. [2018-12-24 14:03:25,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:03:25,144 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2018-12-24 14:03:25,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:03:25,157 INFO L225 Difference]: With dead ends: 4236 [2018-12-24 14:03:25,157 INFO L226 Difference]: Without dead ends: 4233 [2018-12-24 14:03:25,158 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2018-12-24 14:03:25,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4233 states. [2018-12-24 14:03:29,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4233 to 4163. [2018-12-24 14:03:29,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4163 states. [2018-12-24 14:03:29,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4163 states to 4163 states and 29269 transitions. [2018-12-24 14:03:29,089 INFO L78 Accepts]: Start accepts. Automaton has 4163 states and 29269 transitions. Word has length 7 [2018-12-24 14:03:29,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:03:29,090 INFO L480 AbstractCegarLoop]: Abstraction has 4163 states and 29269 transitions. [2018-12-24 14:03:29,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-24 14:03:29,090 INFO L276 IsEmpty]: Start isEmpty. Operand 4163 states and 29269 transitions. [2018-12-24 14:03:29,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:03:29,095 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:03:29,095 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:03:29,096 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:03:29,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:03:29,096 INFO L82 PathProgramCache]: Analyzing trace with hash -2030621364, now seen corresponding path program 1 times [2018-12-24 14:03:29,096 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:03:29,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:29,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:03:29,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:29,097 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:03:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:03:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:03:29,202 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:29,202 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:03:29,202 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:03:29,202 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [22], [28], [29] [2018-12-24 14:03:29,203 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:03:29,203 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:03:29,204 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:03:29,204 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:03:29,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:03:29,205 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:03:29,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:29,205 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 14:03:29,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:03:29,213 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:03:29,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:03:29,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:03:29,237 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,237 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:03:29,270 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,271 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,272 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:03:29,308 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,309 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,310 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,312 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,312 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:03:29,354 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,355 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,356 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,358 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,359 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,360 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:03:29,361 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:29,379 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:29,395 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:29,413 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:29,533 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:03:29,548 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:03:29,559 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:03:29,572 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:03:29,574 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:03:29,583 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:03:29,583 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:29,609 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:29,630 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:29,646 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:29,659 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:29,671 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:29,704 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:29,704 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:72, output treesize:71 [2018-12-24 14:03:29,786 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,787 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:03:29,787 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:29,814 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:29,815 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:50 [2018-12-24 14:03:29,875 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,876 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,877 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,878 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,878 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,879 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,881 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 14:03:29,882 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:29,916 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:29,917 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:40 [2018-12-24 14:03:29,946 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,947 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,948 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,950 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,951 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,952 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,953 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,954 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,955 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,958 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:29,958 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:03:29,959 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 94 [2018-12-24 14:03:29,960 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:30,007 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:30,007 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:36 [2018-12-24 14:03:30,032 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:30,033 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:30,034 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:30,035 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:30,036 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:30,037 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:30,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:30,040 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:30,041 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:30,042 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:30,043 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:30,044 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:30,044 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:03:30,045 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2018-12-24 14:03:30,045 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:30,082 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:30,082 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:40 [2018-12-24 14:03:30,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:03:30,111 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:03:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:03:30,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:03:30,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2018-12-24 14:03:30,205 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:03:30,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:03:30,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:03:30,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:03:30,206 INFO L87 Difference]: Start difference. First operand 4163 states and 29269 transitions. Second operand 12 states. [2018-12-24 14:03:34,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:03:34,789 INFO L93 Difference]: Finished difference Result 4232 states and 29577 transitions. [2018-12-24 14:03:34,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:03:34,790 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2018-12-24 14:03:34,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:03:34,804 INFO L225 Difference]: With dead ends: 4232 [2018-12-24 14:03:34,804 INFO L226 Difference]: Without dead ends: 4231 [2018-12-24 14:03:34,806 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2018-12-24 14:03:34,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2018-12-24 14:03:38,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 4190. [2018-12-24 14:03:38,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4190 states. [2018-12-24 14:03:39,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4190 states to 4190 states and 29458 transitions. [2018-12-24 14:03:39,002 INFO L78 Accepts]: Start accepts. Automaton has 4190 states and 29458 transitions. Word has length 7 [2018-12-24 14:03:39,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:03:39,002 INFO L480 AbstractCegarLoop]: Abstraction has 4190 states and 29458 transitions. [2018-12-24 14:03:39,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:03:39,002 INFO L276 IsEmpty]: Start isEmpty. Operand 4190 states and 29458 transitions. [2018-12-24 14:03:39,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:03:39,009 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:03:39,009 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:03:39,009 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:03:39,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:03:39,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2030548264, now seen corresponding path program 1 times [2018-12-24 14:03:39,009 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:03:39,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:39,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:03:39,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:39,010 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:03:39,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:03:39,158 WARN L181 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-12-24 14:03:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:03:39,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:39,188 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:03:39,188 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:03:39,188 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [24], [28], [30], [31] [2018-12-24 14:03:39,192 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:03:39,192 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:03:39,194 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:03:39,194 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:03:39,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:03:39,194 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:03:39,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:39,194 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:03:39,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:03:39,203 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:03:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:03:39,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:03:39,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2018-12-24 14:03:39,231 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,234 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,234 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2018-12-24 14:03:39,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,275 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,281 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,284 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2018-12-24 14:03:39,330 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,332 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,333 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,334 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,336 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,340 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:03:39,400 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,404 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,408 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,410 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,414 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,414 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:03:39,415 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:39,443 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:39,472 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:39,500 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:39,535 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:39,573 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:03:39,577 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:03:39,581 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:03:39,585 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:03:39,624 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:03:39,628 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:03:39,628 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:39,661 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:39,681 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:39,696 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:39,708 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:39,720 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:39,764 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:39,764 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2018-12-24 14:03:39,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,798 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2018-12-24 14:03:39,798 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:39,840 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:39,841 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2018-12-24 14:03:39,875 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,876 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,877 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,878 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,879 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,883 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,884 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,885 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:39,894 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:03:39,895 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:03:40,043 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:03:40,044 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:98 [2018-12-24 14:03:40,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:40,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:40,106 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:40,107 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:40,108 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:40,109 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:40,111 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:40,112 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:40,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:40,113 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:03:40,114 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:40,115 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2018-12-24 14:03:40,116 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:40,152 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:40,152 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:34 [2018-12-24 14:03:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:03:40,176 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:03:40,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:03:40,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:03:40,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:03:40,232 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:03:40,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:03:40,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:03:40,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:03:40,233 INFO L87 Difference]: Start difference. First operand 4190 states and 29458 transitions. Second operand 10 states. [2018-12-24 14:03:44,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:03:44,839 INFO L93 Difference]: Finished difference Result 4570 states and 31903 transitions. [2018-12-24 14:03:44,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:03:44,839 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2018-12-24 14:03:44,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:03:44,856 INFO L225 Difference]: With dead ends: 4570 [2018-12-24 14:03:44,856 INFO L226 Difference]: Without dead ends: 4569 [2018-12-24 14:03:44,857 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:03:44,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4569 states. [2018-12-24 14:03:49,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4569 to 4419. [2018-12-24 14:03:49,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4419 states. [2018-12-24 14:03:49,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4419 states to 4419 states and 31072 transitions. [2018-12-24 14:03:49,056 INFO L78 Accepts]: Start accepts. Automaton has 4419 states and 31072 transitions. Word has length 7 [2018-12-24 14:03:49,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:03:49,057 INFO L480 AbstractCegarLoop]: Abstraction has 4419 states and 31072 transitions. [2018-12-24 14:03:49,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:03:49,057 INFO L276 IsEmpty]: Start isEmpty. Operand 4419 states and 31072 transitions. [2018-12-24 14:03:49,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:03:49,063 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:03:49,063 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:03:49,063 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:03:49,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:03:49,064 INFO L82 PathProgramCache]: Analyzing trace with hash -2030561782, now seen corresponding path program 1 times [2018-12-24 14:03:49,064 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:03:49,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:49,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:03:49,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:49,065 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:03:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:03:49,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:03:49,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:49,325 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:03:49,325 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:03:49,325 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [24], [28], [29] [2018-12-24 14:03:49,326 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:03:49,326 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:03:49,328 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:03:49,328 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:03:49,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:03:49,328 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:03:49,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:49,328 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 14:03:49,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:03:49,339 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:03:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:03:49,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:03:49,366 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:03:49,369 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:03:49,371 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,373 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:03:49,377 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,379 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,380 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:03:49,385 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,386 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,387 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,389 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,389 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:03:49,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,395 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,396 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,398 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,398 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:03:49,399 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:49,441 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:49,465 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:49,484 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:49,498 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:49,512 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:49,547 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,548 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:03:49,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,589 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,589 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:03:49,631 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,633 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,634 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,635 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,636 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:03:49,686 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,687 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,688 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,689 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,690 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,691 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,692 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:03:49,758 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,759 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,760 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,761 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,762 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,763 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,765 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,766 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,766 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:03:49,767 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:49,793 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:49,820 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:49,847 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:49,872 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:49,919 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:49,919 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2018-12-24 14:03:49,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:49,966 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:03:49,967 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:50,010 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:50,010 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2018-12-24 14:03:50,045 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,046 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,047 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,048 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,049 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,050 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,051 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,052 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,053 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:03:50,054 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:50,218 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:50,218 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2018-12-24 14:03:50,251 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,252 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,253 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,254 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,255 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,256 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,257 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,258 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,259 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,260 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,261 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,262 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:03:50,263 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,264 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2018-12-24 14:03:50,264 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:50,316 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:50,317 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2018-12-24 14:03:50,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,345 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,346 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,347 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,348 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,349 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,350 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,352 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,353 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,354 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,355 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,356 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,357 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,359 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,360 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,361 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:50,361 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:03:50,362 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 131 [2018-12-24 14:03:50,363 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:50,416 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:50,416 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:47 [2018-12-24 14:03:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:03:50,446 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:03:50,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:03:50,553 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:03:50,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2018-12-24 14:03:50,553 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:03:50,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:03:50,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:03:50,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:03:50,554 INFO L87 Difference]: Start difference. First operand 4419 states and 31072 transitions. Second operand 12 states. [2018-12-24 14:03:57,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:03:57,090 INFO L93 Difference]: Finished difference Result 5928 states and 41521 transitions. [2018-12-24 14:03:57,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:03:57,090 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2018-12-24 14:03:57,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:03:57,112 INFO L225 Difference]: With dead ends: 5928 [2018-12-24 14:03:57,112 INFO L226 Difference]: Without dead ends: 5927 [2018-12-24 14:03:57,114 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2018-12-24 14:03:57,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5927 states. [2018-12-24 14:04:02,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5927 to 5628. [2018-12-24 14:04:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5628 states. [2018-12-24 14:04:02,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5628 states to 5628 states and 39710 transitions. [2018-12-24 14:04:02,833 INFO L78 Accepts]: Start accepts. Automaton has 5628 states and 39710 transitions. Word has length 7 [2018-12-24 14:04:02,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:04:02,833 INFO L480 AbstractCegarLoop]: Abstraction has 5628 states and 39710 transitions. [2018-12-24 14:04:02,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:04:02,833 INFO L276 IsEmpty]: Start isEmpty. Operand 5628 states and 39710 transitions. [2018-12-24 14:04:02,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:04:02,840 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:04:02,840 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:04:02,840 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:04:02,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:04:02,840 INFO L82 PathProgramCache]: Analyzing trace with hash -2030965338, now seen corresponding path program 1 times [2018-12-24 14:04:02,841 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:04:02,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:04:02,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:04:02,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:04:02,841 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:04:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:04:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:04:02,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:04:02,952 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:04:02,952 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:04:02,952 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [28], [30], [31] [2018-12-24 14:04:02,953 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:04:02,954 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:04:02,955 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:04:02,955 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:04:02,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:04:02,956 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:04:02,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:04:02,956 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:04:02,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:04:02,972 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:04:02,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:04:02,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:04:03,009 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:04:03,053 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:04:03,107 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,129 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,129 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:04:03,189 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,211 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,211 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:04:03,214 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,216 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,217 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,218 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,219 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:04:03,227 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:04:03,228 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:04:03,254 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:03,274 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:03,290 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:03,302 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:03,314 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:03,337 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:04:03,350 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,352 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,353 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:04:03,383 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,385 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,387 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,388 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,388 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:04:03,426 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,427 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,428 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,429 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,433 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:04:03,433 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:04:03,447 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:03,461 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:03,476 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:03,505 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:04:03,505 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:64, output treesize:67 [2018-12-24 14:04:03,554 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,554 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2018-12-24 14:04:03,555 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:04:03,580 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:04:03,580 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:46 [2018-12-24 14:04:03,606 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,607 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,607 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,611 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,612 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,613 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,621 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 14:04:03,622 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:04:03,733 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:04:03,733 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:68 [2018-12-24 14:04:03,771 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,772 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,772 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,773 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,774 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,775 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,776 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,777 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,778 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,779 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,780 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,780 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:04:03,781 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 101 [2018-12-24 14:04:03,782 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:04:03,835 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,836 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,837 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,838 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,839 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,840 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,841 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,842 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,843 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:03,843 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:04:03,844 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 73 [2018-12-24 14:04:03,845 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:04:03,885 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:04:03,886 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:88, output treesize:70 [2018-12-24 14:04:03,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:04:03,945 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:04:03,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:04:03,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:04:03,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2018-12-24 14:04:03,993 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:04:03,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-24 14:04:03,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-24 14:04:03,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:04:03,994 INFO L87 Difference]: Start difference. First operand 5628 states and 39710 transitions. Second operand 11 states. [2018-12-24 14:04:11,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:04:11,641 INFO L93 Difference]: Finished difference Result 6511 states and 45570 transitions. [2018-12-24 14:04:11,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:04:11,642 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2018-12-24 14:04:11,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:04:11,663 INFO L225 Difference]: With dead ends: 6511 [2018-12-24 14:04:11,663 INFO L226 Difference]: Without dead ends: 6510 [2018-12-24 14:04:11,665 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2018-12-24 14:04:11,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6510 states. [2018-12-24 14:04:19,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6510 to 6405. [2018-12-24 14:04:19,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6405 states. [2018-12-24 14:04:19,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6405 states to 6405 states and 45149 transitions. [2018-12-24 14:04:19,034 INFO L78 Accepts]: Start accepts. Automaton has 6405 states and 45149 transitions. Word has length 7 [2018-12-24 14:04:19,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:04:19,035 INFO L480 AbstractCegarLoop]: Abstraction has 6405 states and 45149 transitions. [2018-12-24 14:04:19,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-24 14:04:19,035 INFO L276 IsEmpty]: Start isEmpty. Operand 6405 states and 45149 transitions. [2018-12-24 14:04:19,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:04:19,042 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:04:19,042 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:04:19,043 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:04:19,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:04:19,043 INFO L82 PathProgramCache]: Analyzing trace with hash -2015785446, now seen corresponding path program 1 times [2018-12-24 14:04:19,043 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:04:19,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:04:19,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:04:19,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:04:19,043 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:04:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:04:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:04:19,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:04:19,338 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:04:19,338 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:04:19,338 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [22], [24], [28], [29] [2018-12-24 14:04:19,339 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:04:19,339 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:04:19,341 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:04:19,341 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:04:19,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:04:19,342 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:04:19,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:04:19,342 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:04:19,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:04:19,352 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:04:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:04:19,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:04:19,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2018-12-24 14:04:19,375 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,378 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,378 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2018-12-24 14:04:19,414 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,415 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,417 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,418 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2018-12-24 14:04:19,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,463 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,466 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,467 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,469 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:04:19,525 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,525 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,526 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,527 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,528 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,529 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,531 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,533 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,533 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:04:19,534 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:04:19,558 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:19,581 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:19,605 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:19,631 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:19,664 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:04:19,668 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:04:19,672 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:04:19,675 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:04:19,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:04:19,683 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:04:19,683 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:04:19,715 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:19,733 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:19,747 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:19,758 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:19,769 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:19,810 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:04:19,810 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:84, output treesize:87 [2018-12-24 14:04:19,881 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:04:19,881 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:04:19,908 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:04:19,908 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:50 [2018-12-24 14:04:19,942 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,943 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,944 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,945 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,946 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,947 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,948 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:19,949 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2018-12-24 14:04:19,949 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:04:19,979 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:04:19,979 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:40 [2018-12-24 14:04:20,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:20,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:20,013 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:20,014 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:20,015 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:20,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:20,017 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:20,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:20,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:20,019 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:04:20,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:20,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 93 [2018-12-24 14:04:20,021 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:04:20,054 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:04:20,054 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:34 [2018-12-24 14:04:20,084 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:20,085 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:20,086 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:20,086 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:20,088 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:20,089 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:20,090 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:20,091 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:20,092 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:20,093 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:20,094 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:20,095 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:20,096 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:04:20,096 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 100 [2018-12-24 14:04:20,097 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:04:20,131 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:04:20,131 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:38 [2018-12-24 14:04:20,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:04:20,160 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:04:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:04:20,249 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:04:20,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2018-12-24 14:04:20,249 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:04:20,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-24 14:04:20,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-24 14:04:20,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:04:20,250 INFO L87 Difference]: Start difference. First operand 6405 states and 45149 transitions. Second operand 13 states. [2018-12-24 14:04:29,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:04:29,476 INFO L93 Difference]: Finished difference Result 7179 states and 50083 transitions. [2018-12-24 14:04:29,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-24 14:04:29,477 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2018-12-24 14:04:29,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:04:29,503 INFO L225 Difference]: With dead ends: 7179 [2018-12-24 14:04:29,503 INFO L226 Difference]: Without dead ends: 7170 [2018-12-24 14:04:29,506 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2018-12-24 14:04:29,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7170 states. [2018-12-24 14:04:36,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7170 to 6542. [2018-12-24 14:04:36,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6542 states. [2018-12-24 14:04:37,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6542 states to 6542 states and 46140 transitions. [2018-12-24 14:04:37,007 INFO L78 Accepts]: Start accepts. Automaton has 6542 states and 46140 transitions. Word has length 7 [2018-12-24 14:04:37,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:04:37,007 INFO L480 AbstractCegarLoop]: Abstraction has 6542 states and 46140 transitions. [2018-12-24 14:04:37,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-24 14:04:37,007 INFO L276 IsEmpty]: Start isEmpty. Operand 6542 states and 46140 transitions. [2018-12-24 14:04:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:04:37,014 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:04:37,014 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:04:37,014 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:04:37,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:04:37,015 INFO L82 PathProgramCache]: Analyzing trace with hash -2015650778, now seen corresponding path program 1 times [2018-12-24 14:04:37,015 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:04:37,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:04:37,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:04:37,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:04:37,016 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:04:37,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:04:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:04:37,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:04:37,055 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:04:37,055 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:04:37,056 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [28], [30], [32], [33] [2018-12-24 14:04:37,057 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:04:37,057 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:04:37,059 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:04:37,059 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:04:37,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:04:37,059 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:04:37,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:04:37,059 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 14:04:37,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:04:37,070 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:04:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:04:37,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:04:37,077 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2018-12-24 14:04:37,081 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2018-12-24 14:04:37,087 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 35 [2018-12-24 14:04:37,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:37,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:37,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:37,109 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:37,110 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 56 [2018-12-24 14:04:37,148 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:37,151 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:37,152 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:37,153 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:37,155 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:37,157 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:37,159 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:37,160 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:37,161 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 37 [2018-12-24 14:04:37,161 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:04:37,177 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:37,193 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:37,209 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:37,225 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:37,246 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:04:37,250 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:04:37,255 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2018-12-24 14:04:37,264 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2018-12-24 14:04:37,272 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 48 [2018-12-24 14:04:37,280 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:04:37,281 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:04:37,303 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:37,315 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:37,326 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:37,337 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:37,348 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:37,377 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:04:37,378 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:59, output treesize:67 [2018-12-24 14:04:37,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:37,428 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 79 [2018-12-24 14:04:37,430 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 8 xjuncts. [2018-12-24 14:04:37,686 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 20 dim-0 vars, and 8 xjuncts. [2018-12-24 14:04:37,686 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:369 [2018-12-24 14:04:37,788 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:37,789 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:37,790 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:37,791 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:37,792 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 42 [2018-12-24 14:04:37,792 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:04:37,804 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:04:37,805 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:18 [2018-12-24 14:04:37,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:04:37,819 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:04:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:04:37,849 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:04:37,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:04:37,850 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:04:37,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:04:37,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:04:37,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:04:37,850 INFO L87 Difference]: Start difference. First operand 6542 states and 46140 transitions. Second operand 8 states. [2018-12-24 14:04:48,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:04:48,556 INFO L93 Difference]: Finished difference Result 10441 states and 73753 transitions. [2018-12-24 14:04:48,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:04:48,556 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-12-24 14:04:48,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:04:48,594 INFO L225 Difference]: With dead ends: 10441 [2018-12-24 14:04:48,594 INFO L226 Difference]: Without dead ends: 10440 [2018-12-24 14:04:48,596 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:04:48,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10440 states. [2018-12-24 14:04:59,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10440 to 10397. [2018-12-24 14:04:59,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10397 states. [2018-12-24 14:04:59,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10397 states to 10397 states and 73709 transitions. [2018-12-24 14:04:59,911 INFO L78 Accepts]: Start accepts. Automaton has 10397 states and 73709 transitions. Word has length 7 [2018-12-24 14:04:59,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:04:59,911 INFO L480 AbstractCegarLoop]: Abstraction has 10397 states and 73709 transitions. [2018-12-24 14:04:59,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:04:59,912 INFO L276 IsEmpty]: Start isEmpty. Operand 10397 states and 73709 transitions. [2018-12-24 14:04:59,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:04:59,922 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:04:59,922 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:04:59,922 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:04:59,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:04:59,923 INFO L82 PathProgramCache]: Analyzing trace with hash -2014341960, now seen corresponding path program 1 times [2018-12-24 14:04:59,923 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:04:59,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:04:59,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:04:59,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:04:59,923 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:04:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:05:00,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:05:00,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:05:00,018 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:05:00,018 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:05:00,018 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [24], [28], [30], [31] [2018-12-24 14:05:00,019 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:05:00,019 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:05:00,021 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:05:00,021 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:05:00,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:05:00,021 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:05:00,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:05:00,021 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:05:00,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:05:00,030 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:05:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:05:00,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:05:00,039 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:05:00,041 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:05:00,045 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,046 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,047 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:05:00,052 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,053 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,055 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,055 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:05:00,059 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,063 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,063 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:05:00,067 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,068 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,070 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,072 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,073 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,074 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:05:00,074 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:00,111 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:00,129 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:00,146 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:00,158 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:00,171 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:00,198 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2018-12-24 14:05:00,214 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,216 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,217 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2018-12-24 14:05:00,251 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,253 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,255 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,256 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,256 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2018-12-24 14:05:00,301 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,302 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,303 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,304 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,305 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,307 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,308 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:05:00,363 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,364 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,365 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,367 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,369 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,371 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,372 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:05:00,372 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:00,395 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:00,418 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:00,441 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:00,466 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:00,506 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:00,507 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2018-12-24 14:05:00,538 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,539 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2018-12-24 14:05:00,539 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:00,577 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:00,577 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2018-12-24 14:05:00,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,605 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,606 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,609 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,610 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:05:00,611 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 102 [2018-12-24 14:05:00,611 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:00,653 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:00,653 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:55 [2018-12-24 14:05:00,679 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,680 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,681 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,682 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,683 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,684 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,685 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,686 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,690 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:00,690 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:05:00,699 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 108 [2018-12-24 14:05:00,700 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:05:00,830 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2018-12-24 14:05:00,831 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:69, output treesize:102 [2018-12-24 14:05:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:00,878 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:05:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:00,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:05:00,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:05:00,930 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:05:00,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:05:00,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:05:00,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:05:00,931 INFO L87 Difference]: Start difference. First operand 10397 states and 73709 transitions. Second operand 10 states. [2018-12-24 14:05:11,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:05:11,948 INFO L93 Difference]: Finished difference Result 10427 states and 73743 transitions. [2018-12-24 14:05:11,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:05:11,949 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2018-12-24 14:05:11,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:05:11,983 INFO L225 Difference]: With dead ends: 10427 [2018-12-24 14:05:11,983 INFO L226 Difference]: Without dead ends: 10426 [2018-12-24 14:05:11,985 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:05:11,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10426 states. [2018-12-24 14:05:23,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10426 to 10394. [2018-12-24 14:05:23,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10394 states. [2018-12-24 14:05:23,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10394 states to 10394 states and 73688 transitions. [2018-12-24 14:05:23,442 INFO L78 Accepts]: Start accepts. Automaton has 10394 states and 73688 transitions. Word has length 7 [2018-12-24 14:05:23,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:05:23,442 INFO L480 AbstractCegarLoop]: Abstraction has 10394 states and 73688 transitions. [2018-12-24 14:05:23,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:05:23,442 INFO L276 IsEmpty]: Start isEmpty. Operand 10394 states and 73688 transitions. [2018-12-24 14:05:23,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:05:23,452 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:05:23,452 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:05:23,452 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:05:23,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:05:23,452 INFO L82 PathProgramCache]: Analyzing trace with hash -2026927280, now seen corresponding path program 1 times [2018-12-24 14:05:23,453 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:05:23,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:05:23,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:05:23,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:05:23,453 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:05:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:05:23,601 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-12-24 14:05:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:23,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:05:23,629 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:05:23,629 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:05:23,629 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [22], [28], [29] [2018-12-24 14:05:23,630 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:05:23,630 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:05:23,631 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:05:23,632 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:05:23,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:05:23,632 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:05:23,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:05:23,633 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:05:23,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:05:23,648 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:05:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:05:23,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:05:23,656 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:05:23,659 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:05:23,663 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:23,664 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:23,665 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:05:23,669 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:23,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:23,672 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:23,672 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:05:23,676 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:23,677 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:23,678 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:23,679 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:23,680 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:05:23,688 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:05:23,689 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:23,713 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:23,732 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:23,747 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:23,759 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:23,772 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:23,793 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:05:23,806 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:23,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:23,809 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:05:23,839 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:23,840 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:23,843 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:23,844 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:23,844 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:05:23,881 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:23,882 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:23,883 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:23,884 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:23,885 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:23,887 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:23,888 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:05:23,888 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:23,902 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:23,916 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:23,931 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:23,960 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:23,960 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:64, output treesize:67 [2018-12-24 14:05:24,009 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,009 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2018-12-24 14:05:24,010 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:24,026 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:24,027 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:33 [2018-12-24 14:05:24,049 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,050 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,051 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,052 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,052 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:05:24,053 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 60 [2018-12-24 14:05:24,053 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:24,072 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:24,073 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:29 [2018-12-24 14:05:24,092 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,092 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,093 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,094 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,095 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,096 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,097 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,098 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 61 [2018-12-24 14:05:24,098 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:24,117 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:24,117 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:29 [2018-12-24 14:05:24,136 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,137 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,138 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,138 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,140 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,141 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,142 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,143 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,144 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,144 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:05:24,145 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 75 [2018-12-24 14:05:24,145 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:24,167 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:24,168 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:39, output treesize:33 [2018-12-24 14:05:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:24,186 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:05:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:24,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:05:24,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2018-12-24 14:05:24,263 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:05:24,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:05:24,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:05:24,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:05:24,264 INFO L87 Difference]: Start difference. First operand 10394 states and 73688 transitions. Second operand 12 states. [2018-12-24 14:05:36,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:05:36,355 INFO L93 Difference]: Finished difference Result 11408 states and 80747 transitions. [2018-12-24 14:05:36,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:05:36,355 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2018-12-24 14:05:36,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:05:36,397 INFO L225 Difference]: With dead ends: 11408 [2018-12-24 14:05:36,398 INFO L226 Difference]: Without dead ends: 11406 [2018-12-24 14:05:36,400 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2018-12-24 14:05:36,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11406 states. [2018-12-24 14:05:48,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11406 to 11270. [2018-12-24 14:05:48,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11270 states. [2018-12-24 14:05:48,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11270 states to 11270 states and 80138 transitions. [2018-12-24 14:05:48,625 INFO L78 Accepts]: Start accepts. Automaton has 11270 states and 80138 transitions. Word has length 7 [2018-12-24 14:05:48,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:05:48,625 INFO L480 AbstractCegarLoop]: Abstraction has 11270 states and 80138 transitions. [2018-12-24 14:05:48,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:05:48,625 INFO L276 IsEmpty]: Start isEmpty. Operand 11270 states and 80138 transitions. [2018-12-24 14:05:48,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:05:48,636 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:05:48,636 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-12-24 14:05:48,636 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:05:48,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:05:48,636 INFO L82 PathProgramCache]: Analyzing trace with hash -2023700554, now seen corresponding path program 2 times [2018-12-24 14:05:48,636 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:05:48,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:05:48,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:05:48,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:05:48,637 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:05:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:05:48,789 WARN L181 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2018-12-24 14:05:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:05:48,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:05:48,870 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:05:48,871 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:05:48,871 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:05:48,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:05:48,871 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:05:48,882 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:05:48,882 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:05:48,890 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-24 14:05:48,890 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:05:48,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:05:48,910 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:05:48,929 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:05:48,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:48,989 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:48,990 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:05:49,027 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,052 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,077 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,078 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:05:49,119 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,146 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,173 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,194 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,194 INFO L303 Elim1Store]: Index analysis took 115 ms [2018-12-24 14:05:49,195 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:05:49,229 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,250 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,252 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,253 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,254 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,255 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:05:49,255 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:49,292 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:49,314 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:49,332 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:49,346 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:49,359 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:49,391 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,392 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:05:49,428 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,429 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,429 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:05:49,470 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,471 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,474 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:05:49,523 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,524 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,525 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,526 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,528 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,529 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,529 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:05:49,590 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,592 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,593 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,594 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,595 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,597 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:49,598 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:05:49,598 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:49,621 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:49,907 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:49,934 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:49,959 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:50,002 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:50,002 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:05:50,036 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,037 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:05:50,037 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:50,078 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:50,078 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2018-12-24 14:05:50,107 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,108 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,109 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,110 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,111 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,112 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,114 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,114 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:05:50,115 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:50,161 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:50,161 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2018-12-24 14:05:50,188 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,189 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,190 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,191 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,192 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,193 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,194 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,195 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,196 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,197 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,200 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,201 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:05:50,202 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2018-12-24 14:05:50,203 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:50,253 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:50,253 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:67, output treesize:49 [2018-12-24 14:05:50,358 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,358 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,359 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,360 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,362 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,363 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,364 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,365 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,367 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,369 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,370 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,371 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,371 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:05:50,372 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2018-12-24 14:05:50,374 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:50,422 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:50,422 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:59, output treesize:43 [2018-12-24 14:05:50,449 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,451 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,452 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,453 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,454 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,456 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,458 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,459 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,460 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,461 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,463 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,465 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,466 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,468 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,469 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:50,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 125 [2018-12-24 14:05:50,470 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:50,520 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:50,521 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:57, output treesize:41 [2018-12-24 14:05:50,546 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:50,546 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:05:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:50,641 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:05:50,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2018-12-24 14:05:50,642 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:05:50,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-24 14:05:50,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-24 14:05:50,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2018-12-24 14:05:50,642 INFO L87 Difference]: Start difference. First operand 11270 states and 80138 transitions. Second operand 13 states. [2018-12-24 14:06:06,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:06:06,605 INFO L93 Difference]: Finished difference Result 14692 states and 103813 transitions. [2018-12-24 14:06:06,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-24 14:06:06,605 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2018-12-24 14:06:06,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:06:06,664 INFO L225 Difference]: With dead ends: 14692 [2018-12-24 14:06:06,664 INFO L226 Difference]: Without dead ends: 14688 [2018-12-24 14:06:06,668 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-12-24 14:06:06,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14688 states. [2018-12-24 14:06:21,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14688 to 12758. [2018-12-24 14:06:21,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12758 states. [2018-12-24 14:06:21,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12758 states to 12758 states and 90546 transitions. [2018-12-24 14:06:21,444 INFO L78 Accepts]: Start accepts. Automaton has 12758 states and 90546 transitions. Word has length 7 [2018-12-24 14:06:21,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:06:21,445 INFO L480 AbstractCegarLoop]: Abstraction has 12758 states and 90546 transitions. [2018-12-24 14:06:21,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-24 14:06:21,445 INFO L276 IsEmpty]: Start isEmpty. Operand 12758 states and 90546 transitions. [2018-12-24 14:06:21,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:06:21,455 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:06:21,456 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:06:21,456 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:06:21,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:06:21,456 INFO L82 PathProgramCache]: Analyzing trace with hash -2023160096, now seen corresponding path program 1 times [2018-12-24 14:06:21,456 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:06:21,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:06:21,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:06:21,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:06:21,457 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:06:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:06:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:06:21,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:06:21,501 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:06:21,501 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:06:21,501 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [24], [28], [30], [31] [2018-12-24 14:06:21,502 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:06:21,502 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:06:21,504 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:06:21,504 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:06:21,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:06:21,504 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:06:21,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:06:21,504 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:06:21,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:06:21,513 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:06:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:06:21,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:06:21,539 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:06:21,543 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:06:21,546 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,547 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,547 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:06:21,552 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,553 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,555 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,555 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:06:21,559 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,561 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,562 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,563 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,563 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:06:21,599 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,600 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,602 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,605 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:06:21,605 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:06:21,641 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:21,662 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:21,678 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:21,691 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:21,706 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:21,731 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2018-12-24 14:06:21,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,750 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,750 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2018-12-24 14:06:21,786 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,788 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,790 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,791 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,791 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2018-12-24 14:06:21,836 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,838 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,839 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,840 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,841 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,843 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,844 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:06:21,898 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,899 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,900 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,902 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,903 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,904 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,905 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,907 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:21,907 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:06:21,908 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:06:21,931 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:21,954 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:21,976 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:22,001 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:22,042 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:06:22,043 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2018-12-24 14:06:22,074 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:22,074 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2018-12-24 14:06:22,075 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:06:22,113 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:06:22,113 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2018-12-24 14:06:22,204 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:22,205 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:22,206 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:22,206 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:22,207 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:22,209 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:22,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:22,211 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:22,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 109 [2018-12-24 14:06:22,213 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:06:22,254 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:06:22,254 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:53 [2018-12-24 14:06:22,277 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:22,278 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:22,279 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:22,280 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:22,281 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:22,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:22,284 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:22,286 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:22,287 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:22,288 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:22,289 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:22,290 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:06:22,291 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:22,292 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2018-12-24 14:06:22,292 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:06:22,335 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:06:22,335 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:43 [2018-12-24 14:06:22,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:06:22,356 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:06:22,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:06:22,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:06:22,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:06:22,407 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:06:22,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:06:22,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:06:22,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:06:22,408 INFO L87 Difference]: Start difference. First operand 12758 states and 90546 transitions. Second operand 10 states. [2018-12-24 14:06:35,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:06:35,949 INFO L93 Difference]: Finished difference Result 13016 states and 92075 transitions. [2018-12-24 14:06:35,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:06:35,950 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2018-12-24 14:06:35,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:06:35,998 INFO L225 Difference]: With dead ends: 13016 [2018-12-24 14:06:35,999 INFO L226 Difference]: Without dead ends: 13015 [2018-12-24 14:06:36,002 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:06:36,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13015 states. [2018-12-24 14:06:50,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13015 to 12958. [2018-12-24 14:06:50,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12958 states. [2018-12-24 14:06:50,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12958 states to 12958 states and 91946 transitions. [2018-12-24 14:06:50,194 INFO L78 Accepts]: Start accepts. Automaton has 12958 states and 91946 transitions. Word has length 7 [2018-12-24 14:06:50,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:06:50,194 INFO L480 AbstractCegarLoop]: Abstraction has 12958 states and 91946 transitions. [2018-12-24 14:06:50,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:06:50,194 INFO L276 IsEmpty]: Start isEmpty. Operand 12958 states and 91946 transitions. [2018-12-24 14:06:50,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:06:50,206 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:06:50,207 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-12-24 14:06:50,207 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:06:50,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:06:50,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1920990370, now seen corresponding path program 1 times [2018-12-24 14:06:50,207 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:06:50,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:06:50,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:06:50,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:06:50,208 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:06:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:06:50,430 WARN L181 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 13 [2018-12-24 14:06:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:06:50,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:06:50,439 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:06:50,439 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:06:50,439 INFO L207 CegarAbsIntRunner]: [0], [6], [28], [30], [32], [33] [2018-12-24 14:06:50,440 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:06:50,440 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:06:50,441 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:06:50,442 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 14:06:50,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:06:50,442 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:06:50,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:06:50,442 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:06:50,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:06:50,451 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:06:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:06:50,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:06:50,461 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:06:50,463 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:06:50,469 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,470 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,471 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:06:50,476 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,477 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,479 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:06:50,482 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,485 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,486 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,487 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,487 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:06:50,496 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:06:50,497 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:06:50,523 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:50,543 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:50,558 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:50,570 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:50,583 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:50,605 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:06:50,619 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,621 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,621 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:06:50,650 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,651 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,653 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,654 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,654 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:06:50,692 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,693 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,694 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,695 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,696 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,698 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,698 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:06:50,699 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:06:50,713 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:50,727 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:50,742 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:50,771 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:06:50,771 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:64, output treesize:67 [2018-12-24 14:06:50,800 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,808 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:06:50,809 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:06:50,897 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:06:50,897 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:88 [2018-12-24 14:06:50,946 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,946 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,947 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,948 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,949 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,950 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:50,951 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:06:50,951 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:06:50,971 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:06:50,971 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:33 [2018-12-24 14:06:50,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:06:50,986 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:06:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:06:51,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:06:51,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 8 [2018-12-24 14:06:51,021 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:06:51,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-24 14:06:51,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-24 14:06:51,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:06:51,022 INFO L87 Difference]: Start difference. First operand 12958 states and 91946 transitions. Second operand 7 states. [2018-12-24 14:07:04,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:07:04,453 INFO L93 Difference]: Finished difference Result 12974 states and 91967 transitions. [2018-12-24 14:07:04,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:07:04,454 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-12-24 14:07:04,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:07:04,501 INFO L225 Difference]: With dead ends: 12974 [2018-12-24 14:07:04,501 INFO L226 Difference]: Without dead ends: 12973 [2018-12-24 14:07:04,504 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:07:04,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12973 states. [2018-12-24 14:07:18,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12973 to 12958. [2018-12-24 14:07:18,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12958 states. [2018-12-24 14:07:18,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12958 states to 12958 states and 91946 transitions. [2018-12-24 14:07:18,887 INFO L78 Accepts]: Start accepts. Automaton has 12958 states and 91946 transitions. Word has length 7 [2018-12-24 14:07:18,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:07:18,887 INFO L480 AbstractCegarLoop]: Abstraction has 12958 states and 91946 transitions. [2018-12-24 14:07:18,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-24 14:07:18,887 INFO L276 IsEmpty]: Start isEmpty. Operand 12958 states and 91946 transitions. [2018-12-24 14:07:18,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:07:18,897 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:07:18,897 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:07:18,897 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:07:18,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:07:18,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1935645556, now seen corresponding path program 1 times [2018-12-24 14:07:18,898 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:07:18,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:07:18,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:07:18,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:07:18,898 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:07:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:07:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:07:18,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:07:18,950 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:07:18,950 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:07:18,950 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [24], [28], [30], [31] [2018-12-24 14:07:18,951 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:07:18,951 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:07:18,952 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:07:18,952 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:07:18,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:07:18,953 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:07:18,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:07:18,953 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:07:18,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:07:18,962 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:07:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:07:18,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:07:18,971 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:07:18,975 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:07:18,980 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:18,982 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:18,983 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:07:18,986 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:18,988 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:18,989 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:18,989 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:07:18,993 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:18,994 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:18,995 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:18,996 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:18,997 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:07:19,001 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,002 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,003 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,004 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,006 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,006 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:07:19,007 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:19,041 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:19,061 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:19,077 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:19,090 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:19,103 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:19,128 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2018-12-24 14:07:19,143 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,145 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,146 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2018-12-24 14:07:19,181 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,182 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,184 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,185 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,186 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2018-12-24 14:07:19,229 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,231 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,232 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,233 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,234 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,236 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,237 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:07:19,292 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,293 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,294 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,295 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,296 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,297 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,298 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,300 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,301 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:07:19,301 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:19,324 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:19,347 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:19,370 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:19,395 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:19,439 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:07:19,440 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2018-12-24 14:07:19,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,481 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:07:19,482 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:07:19,621 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:07:19,621 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:138 [2018-12-24 14:07:19,677 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,678 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,678 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:07:19,678 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:07:19,679 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:19,713 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:07:19,713 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:42 [2018-12-24 14:07:19,736 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,737 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,738 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,739 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,740 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,743 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:19,744 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:07:19,745 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:19,776 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:07:19,776 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:52, output treesize:34 [2018-12-24 14:07:19,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:07:19,799 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:07:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:07:19,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:07:19,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:07:19,857 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:07:19,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:07:19,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:07:19,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:07:19,858 INFO L87 Difference]: Start difference. First operand 12958 states and 91946 transitions. Second operand 10 states. [2018-12-24 14:07:33,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:07:33,874 INFO L93 Difference]: Finished difference Result 13106 states and 92752 transitions. [2018-12-24 14:07:33,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:07:33,874 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2018-12-24 14:07:33,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:07:33,920 INFO L225 Difference]: With dead ends: 13106 [2018-12-24 14:07:33,920 INFO L226 Difference]: Without dead ends: 13105 [2018-12-24 14:07:33,923 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:07:33,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13105 states. [2018-12-24 14:07:47,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13105 to 13023. [2018-12-24 14:07:47,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13023 states. [2018-12-24 14:07:48,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13023 states to 13023 states and 92401 transitions. [2018-12-24 14:07:48,029 INFO L78 Accepts]: Start accepts. Automaton has 13023 states and 92401 transitions. Word has length 7 [2018-12-24 14:07:48,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:07:48,029 INFO L480 AbstractCegarLoop]: Abstraction has 13023 states and 92401 transitions. [2018-12-24 14:07:48,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:07:48,029 INFO L276 IsEmpty]: Start isEmpty. Operand 13023 states and 92401 transitions. [2018-12-24 14:07:48,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:07:48,040 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:07:48,040 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:07:48,040 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:07:48,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:07:48,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1935632038, now seen corresponding path program 1 times [2018-12-24 14:07:48,040 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:07:48,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:07:48,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:07:48,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:07:48,041 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:07:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:07:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:07:48,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:07:48,143 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:07:48,143 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:07:48,143 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [22], [24], [28], [29] [2018-12-24 14:07:48,144 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:07:48,144 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:07:48,145 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:07:48,145 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:07:48,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:07:48,146 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:07:48,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:07:48,146 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 14:07:48,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:07:48,154 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:07:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:07:48,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:07:48,179 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:07:48,182 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:07:48,184 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,185 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,186 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:07:48,190 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,191 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,191 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,192 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:07:48,195 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,196 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,197 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,198 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:07:48,203 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,204 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,205 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,206 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,207 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,208 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:07:48,209 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:48,248 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:48,268 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:48,284 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:48,298 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:48,311 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:48,343 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,344 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:07:48,381 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,382 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,383 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:07:48,424 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,425 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,426 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,427 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,428 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:07:48,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,482 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,483 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,484 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:07:48,545 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,547 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,548 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,549 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,550 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,551 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,552 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,553 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,554 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:07:48,554 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:48,579 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:48,603 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:48,628 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:48,653 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:48,696 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:07:48,696 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2018-12-24 14:07:48,740 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,740 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:07:48,741 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:48,784 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:07:48,784 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2018-12-24 14:07:48,841 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,842 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,843 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,844 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,846 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,847 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,848 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,848 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:07:48,849 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2018-12-24 14:07:48,849 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:48,892 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:07:48,893 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:59 [2018-12-24 14:07:48,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,926 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,926 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,927 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,929 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,930 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,931 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,932 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,933 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,934 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:48,935 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:07:48,936 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:48,979 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:07:48,980 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:69, output treesize:47 [2018-12-24 14:07:49,011 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:49,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:49,013 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:49,014 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:49,015 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:49,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:49,017 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:49,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:49,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:49,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:49,021 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:49,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:49,023 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:49,024 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:49,025 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:49,025 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:07:49,026 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2018-12-24 14:07:49,027 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:49,075 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:07:49,075 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:49 [2018-12-24 14:07:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:07:49,110 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:07:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:07:49,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:07:49,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2018-12-24 14:07:49,190 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:07:49,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:07:49,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:07:49,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:07:49,191 INFO L87 Difference]: Start difference. First operand 13023 states and 92401 transitions. Second operand 12 states. [2018-12-24 14:08:03,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:08:03,442 INFO L93 Difference]: Finished difference Result 13278 states and 93926 transitions. [2018-12-24 14:08:03,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:08:03,442 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2018-12-24 14:08:03,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:08:03,491 INFO L225 Difference]: With dead ends: 13278 [2018-12-24 14:08:03,491 INFO L226 Difference]: Without dead ends: 13277 [2018-12-24 14:08:03,494 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2018-12-24 14:08:03,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13277 states. [2018-12-24 14:08:17,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13277 to 13233. [2018-12-24 14:08:17,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13233 states. [2018-12-24 14:08:17,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13233 states to 13233 states and 93871 transitions. [2018-12-24 14:08:17,968 INFO L78 Accepts]: Start accepts. Automaton has 13233 states and 93871 transitions. Word has length 7 [2018-12-24 14:08:17,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:08:17,968 INFO L480 AbstractCegarLoop]: Abstraction has 13233 states and 93871 transitions. [2018-12-24 14:08:17,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:08:17,968 INFO L276 IsEmpty]: Start isEmpty. Operand 13233 states and 93871 transitions. [2018-12-24 14:08:17,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:08:17,979 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:08:17,979 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:08:17,979 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:08:17,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:08:17,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1935214964, now seen corresponding path program 1 times [2018-12-24 14:08:17,979 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:08:17,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:08:17,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:08:17,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:08:17,980 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:08:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:08:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:08:18,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:08:18,126 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:08:18,127 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:08:18,127 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [14], [22], [28], [29] [2018-12-24 14:08:18,127 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:08:18,128 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:08:18,129 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:08:18,129 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:08:18,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:08:18,130 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:08:18,130 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:08:18,130 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:08:18,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:08:18,137 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:08:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:08:18,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:08:18,161 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:08:18,164 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:08:18,168 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,168 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,169 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:08:18,175 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,176 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,176 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,177 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:08:18,180 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,180 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,181 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,182 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,183 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:08:18,191 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:08:18,192 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:08:18,218 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:18,240 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:18,257 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:18,269 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:18,281 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:18,308 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,308 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:08:18,338 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,339 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,340 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:08:18,374 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,375 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,376 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,377 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,378 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:08:18,419 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,420 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,421 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,422 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,423 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,424 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:08:18,425 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:08:18,441 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:18,457 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:18,472 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:18,502 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:08:18,502 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2018-12-24 14:08:18,556 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,556 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:08:18,556 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:08:18,585 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:08:18,585 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2018-12-24 14:08:18,612 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,613 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,614 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,615 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,616 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,617 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:18,617 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:08:18,618 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2018-12-24 14:08:18,618 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:08:18,648 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:08:18,649 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:42 [2018-12-24 14:08:19,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:19,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:19,958 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:19,959 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:19,960 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:19,961 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:19,962 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:19,963 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:19,964 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:19,965 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2018-12-24 14:08:19,965 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:08:19,997 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:08:19,998 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:34 [2018-12-24 14:08:20,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:20,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:20,023 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:20,024 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:20,025 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:20,027 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:20,028 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:20,029 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:20,030 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:20,031 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:20,032 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:20,033 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:20,034 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:08:20,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2018-12-24 14:08:20,035 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:08:20,068 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:08:20,068 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:40 [2018-12-24 14:08:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:08:20,091 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:08:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:08:20,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:08:20,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2018-12-24 14:08:20,165 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:08:20,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-24 14:08:20,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-24 14:08:20,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:08:20,166 INFO L87 Difference]: Start difference. First operand 13233 states and 93871 transitions. Second operand 13 states. [2018-12-24 14:08:38,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:08:38,249 INFO L93 Difference]: Finished difference Result 17581 states and 124519 transitions. [2018-12-24 14:08:38,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-24 14:08:38,250 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2018-12-24 14:08:38,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:08:38,319 INFO L225 Difference]: With dead ends: 17581 [2018-12-24 14:08:38,319 INFO L226 Difference]: Without dead ends: 17580 [2018-12-24 14:08:38,323 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2018-12-24 14:08:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17580 states. [2018-12-24 14:08:49,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17580 to 9927. [2018-12-24 14:08:49,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9927 states. [2018-12-24 14:08:50,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9927 states to 9927 states and 70376 transitions. [2018-12-24 14:08:50,007 INFO L78 Accepts]: Start accepts. Automaton has 9927 states and 70376 transitions. Word has length 7 [2018-12-24 14:08:50,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:08:50,008 INFO L480 AbstractCegarLoop]: Abstraction has 9927 states and 70376 transitions. [2018-12-24 14:08:50,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-24 14:08:50,008 INFO L276 IsEmpty]: Start isEmpty. Operand 9927 states and 70376 transitions. [2018-12-24 14:08:50,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:08:50,016 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:08:50,016 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:08:50,016 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:08:50,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:08:50,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1935766706, now seen corresponding path program 1 times [2018-12-24 14:08:50,017 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:08:50,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:08:50,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:08:50,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:08:50,017 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:08:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:08:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:08:50,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:08:50,070 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:08:50,070 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:08:50,070 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [28], [30], [32], [33] [2018-12-24 14:08:50,071 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:08:50,071 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:08:50,072 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:08:50,072 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:08:50,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:08:50,073 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:08:50,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:08:50,073 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:08:50,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:08:50,082 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:08:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:08:50,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:08:50,246 INFO L303 Elim1Store]: Index analysis took 157 ms [2018-12-24 14:08:50,246 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:08:50,251 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:08:50,257 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,258 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,258 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:08:50,262 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,263 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,264 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,265 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:08:50,269 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,271 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,272 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,274 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:08:50,278 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,280 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,284 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,285 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:08:50,286 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:08:50,324 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:50,344 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:50,361 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:50,373 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:50,386 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:50,413 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2018-12-24 14:08:50,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,432 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2018-12-24 14:08:50,468 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,469 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,473 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2018-12-24 14:08:50,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,518 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,519 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,520 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,521 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,523 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,524 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:08:50,580 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,582 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,583 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,584 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,586 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,588 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,589 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,589 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:08:50,590 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:08:50,613 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:50,636 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:50,659 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:50,684 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:50,725 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:08:50,726 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2018-12-24 14:08:50,753 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:50,761 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:08:50,762 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:08:50,899 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:08:50,899 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:138 [2018-12-24 14:08:51,200 WARN L181 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2018-12-24 14:08:51,205 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:51,205 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:51,206 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:08:51,206 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2018-12-24 14:08:51,206 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:08:51,236 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:08:51,236 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:42 [2018-12-24 14:08:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:08:51,255 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:08:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:08:51,295 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:08:51,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:08:51,295 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:08:51,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:08:51,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:08:51,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:08:51,296 INFO L87 Difference]: Start difference. First operand 9927 states and 70376 transitions. Second operand 8 states. [2018-12-24 14:09:02,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:09:02,120 INFO L93 Difference]: Finished difference Result 9947 states and 70395 transitions. [2018-12-24 14:09:02,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:09:02,120 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-12-24 14:09:02,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:09:02,152 INFO L225 Difference]: With dead ends: 9947 [2018-12-24 14:09:02,152 INFO L226 Difference]: Without dead ends: 9946 [2018-12-24 14:09:02,154 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:09:02,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9946 states. [2018-12-24 14:09:13,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9946 to 9927. [2018-12-24 14:09:13,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9927 states. [2018-12-24 14:09:13,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9927 states to 9927 states and 70376 transitions. [2018-12-24 14:09:13,398 INFO L78 Accepts]: Start accepts. Automaton has 9927 states and 70376 transitions. Word has length 7 [2018-12-24 14:09:13,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:09:13,399 INFO L480 AbstractCegarLoop]: Abstraction has 9927 states and 70376 transitions. [2018-12-24 14:09:13,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:09:13,399 INFO L276 IsEmpty]: Start isEmpty. Operand 9927 states and 70376 transitions. [2018-12-24 14:09:13,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:09:13,406 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:09:13,407 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-12-24 14:09:13,407 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:09:13,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:09:13,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1937303618, now seen corresponding path program 3 times [2018-12-24 14:09:13,407 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:09:13,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:09:13,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:09:13,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:09:13,408 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:09:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:09:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:09:13,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:09:13,464 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:09:13,464 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:09:13,464 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:09:13,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:09:13,465 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 14:09:13,477 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-24 14:09:13,477 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-24 14:09:13,481 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-24 14:09:13,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:09:13,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:09:13,502 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:09:13,504 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:09:13,507 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:13,508 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:13,508 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:09:13,512 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:13,513 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:13,514 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:13,515 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:09:13,519 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:13,520 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:13,521 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:13,523 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:13,524 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:09:13,532 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:09:13,533 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:13,561 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:13,580 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:13,597 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:13,611 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:13,623 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:13,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:13,649 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:09:13,677 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:13,678 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:13,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:09:13,712 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:13,714 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:13,715 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:13,716 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:13,716 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:09:13,757 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:13,758 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:13,759 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:13,760 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:13,761 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:13,762 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:13,763 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:09:13,763 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:13,779 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:13,794 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:13,809 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:13,840 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:09:13,841 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2018-12-24 14:09:13,950 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:13,958 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2018-12-24 14:09:13,959 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:09:14,062 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2018-12-24 14:09:14,062 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:81, output treesize:109 [2018-12-24 14:09:14,172 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,173 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,175 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,175 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:09:14,176 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 72 [2018-12-24 14:09:14,177 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:14,246 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,250 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,252 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,256 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,257 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,260 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,261 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,262 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,291 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 65 treesize of output 107 [2018-12-24 14:09:14,294 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 16 xjuncts. [2018-12-24 14:09:14,594 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 13 dim-0 vars, and 6 xjuncts. [2018-12-24 14:09:14,595 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:126, output treesize:280 [2018-12-24 14:09:14,737 WARN L181 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 92 [2018-12-24 14:09:14,743 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,746 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,748 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,749 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,750 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,751 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,752 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,752 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:09:14,753 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 93 [2018-12-24 14:09:14,754 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:14,888 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,889 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,890 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,891 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,892 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,893 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,894 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,895 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,896 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,897 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,898 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,899 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,900 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:14,901 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2018-12-24 14:09:14,901 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:15,026 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,027 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,028 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,029 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,030 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,031 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,032 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,033 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,034 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,035 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,036 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,037 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,037 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:09:15,038 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 113 [2018-12-24 14:09:15,038 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:15,163 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,163 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 66 [2018-12-24 14:09:15,164 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:15,244 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2018-12-24 14:09:15,244 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:227, output treesize:161 [2018-12-24 14:09:15,322 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,322 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,323 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,324 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,325 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,326 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,327 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,327 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 78 [2018-12-24 14:09:15,328 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:15,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,439 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,441 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,442 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,443 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,444 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,445 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,446 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,447 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,448 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,449 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,450 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,452 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,452 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2018-12-24 14:09:15,453 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:15,565 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,566 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,567 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,568 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,570 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,571 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,572 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,573 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,574 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,575 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,576 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,577 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,578 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,579 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,580 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 108 [2018-12-24 14:09:15,581 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:15,691 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,692 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,693 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,694 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,695 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,696 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,698 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,699 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,700 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,701 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,702 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,703 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,704 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,705 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,706 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 100 [2018-12-24 14:09:15,706 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:15,805 INFO L267 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 4 dim-1 vars, End of recursive call: 12 dim-0 vars, and 4 xjuncts. [2018-12-24 14:09:15,805 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 16 variables, input treesize:209, output treesize:153 [2018-12-24 14:09:15,894 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,895 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,896 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,897 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,898 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,899 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,900 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,901 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,902 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,903 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,904 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,905 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,907 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,908 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,909 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,910 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,911 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:15,911 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:09:15,912 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 123 [2018-12-24 14:09:15,913 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:16,036 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,037 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,039 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,040 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,041 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,042 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,043 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,044 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,045 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,046 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,047 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,048 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,049 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,050 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 118 [2018-12-24 14:09:16,051 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:16,165 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,166 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,167 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,168 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,169 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,171 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,172 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,173 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,175 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,176 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,177 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,178 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,179 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,180 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,181 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:09:16,182 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,183 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 125 [2018-12-24 14:09:16,183 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:16,291 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,293 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,294 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,295 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,296 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,297 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,298 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:16,299 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 88 [2018-12-24 14:09:16,299 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:16,374 INFO L267 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 4 dim-1 vars, End of recursive call: 16 dim-0 vars, and 4 xjuncts. [2018-12-24 14:09:16,375 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 20 variables, input treesize:201, output treesize:141 [2018-12-24 14:09:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:09:16,473 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:09:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:09:16,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:09:16,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2018-12-24 14:09:16,635 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:09:16,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-24 14:09:16,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-24 14:09:16,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2018-12-24 14:09:16,636 INFO L87 Difference]: Start difference. First operand 9927 states and 70376 transitions. Second operand 13 states. [2018-12-24 14:09:16,844 WARN L181 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2018-12-24 14:09:17,131 WARN L181 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2018-12-24 14:09:17,422 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 72 [2018-12-24 14:09:18,666 WARN L181 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 78 [2018-12-24 14:09:20,345 WARN L181 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 88 [2018-12-24 14:09:33,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:09:33,417 INFO L93 Difference]: Finished difference Result 12394 states and 87417 transitions. [2018-12-24 14:09:33,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-24 14:09:33,417 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2018-12-24 14:09:33,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:09:33,465 INFO L225 Difference]: With dead ends: 12394 [2018-12-24 14:09:33,466 INFO L226 Difference]: Without dead ends: 12392 [2018-12-24 14:09:33,469 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2018-12-24 14:09:33,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12392 states. [2018-12-24 14:09:43,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12392 to 7195. [2018-12-24 14:09:43,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7195 states. [2018-12-24 14:09:43,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7195 states to 7195 states and 51194 transitions. [2018-12-24 14:09:43,211 INFO L78 Accepts]: Start accepts. Automaton has 7195 states and 51194 transitions. Word has length 7 [2018-12-24 14:09:43,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:09:43,211 INFO L480 AbstractCegarLoop]: Abstraction has 7195 states and 51194 transitions. [2018-12-24 14:09:43,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-24 14:09:43,211 INFO L276 IsEmpty]: Start isEmpty. Operand 7195 states and 51194 transitions. [2018-12-24 14:09:43,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:09:43,217 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:09:43,217 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:09:43,217 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:09:43,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:09:43,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1937075524, now seen corresponding path program 1 times [2018-12-24 14:09:43,218 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:09:43,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:09:43,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:09:43,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:09:43,218 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:09:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:09:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:09:43,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:09:43,288 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:09:43,288 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:09:43,288 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [24], [28], [30], [31] [2018-12-24 14:09:43,289 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:09:43,289 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:09:43,291 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:09:43,291 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:09:43,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:09:43,291 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:09:43,292 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:09:43,292 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:09:43,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:09:43,302 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:09:43,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:09:43,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:09:43,310 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:09:43,314 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:09:43,319 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,321 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:09:43,326 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,327 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,328 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,329 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:09:43,332 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,333 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,335 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,336 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,336 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:09:43,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,341 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,342 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,343 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,345 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,345 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:09:43,346 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:43,383 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:43,403 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:43,419 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:43,431 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:43,444 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:43,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2018-12-24 14:09:43,485 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,487 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,487 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2018-12-24 14:09:43,523 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,524 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,526 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,527 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,528 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2018-12-24 14:09:43,572 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,573 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,574 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,576 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,577 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,579 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,579 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:09:43,635 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,637 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,638 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,639 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,640 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,641 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,642 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,644 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,645 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:09:43,645 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:43,668 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:43,691 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:43,714 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:43,739 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:43,779 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:09:43,779 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2018-12-24 14:09:43,814 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:43,822 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:09:43,823 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:09:43,961 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:09:43,961 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:138 [2018-12-24 14:09:44,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,063 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,064 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,064 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,065 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,066 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 90 [2018-12-24 14:09:44,066 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:44,147 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,148 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,150 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,151 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,152 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,153 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,154 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,155 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,155 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 127 [2018-12-24 14:09:44,156 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:44,233 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:09:44,233 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:150, output treesize:94 [2018-12-24 14:09:44,279 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,280 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,281 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,284 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,285 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,286 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,287 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,288 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:09:44,289 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,289 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 88 [2018-12-24 14:09:44,290 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:44,360 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,361 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,362 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,364 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,365 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,367 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,369 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,370 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,371 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,372 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:09:44,373 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:44,374 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 138 [2018-12-24 14:09:44,374 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:44,453 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2018-12-24 14:09:44,454 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 11 variables, input treesize:118, output treesize:100 [2018-12-24 14:09:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:09:44,522 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:09:44,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:09:44,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:09:44,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:09:44,578 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:09:44,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:09:44,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:09:44,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:09:44,579 INFO L87 Difference]: Start difference. First operand 7195 states and 51194 transitions. Second operand 10 states. [2018-12-24 14:09:46,923 WARN L181 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2018-12-24 14:09:48,621 WARN L181 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2018-12-24 14:09:57,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:09:57,398 INFO L93 Difference]: Finished difference Result 7367 states and 52064 transitions. [2018-12-24 14:09:57,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:09:57,399 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2018-12-24 14:09:57,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:09:57,421 INFO L225 Difference]: With dead ends: 7367 [2018-12-24 14:09:57,421 INFO L226 Difference]: Without dead ends: 7366 [2018-12-24 14:09:57,422 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:09:57,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7366 states. [2018-12-24 14:10:07,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7366 to 7259. [2018-12-24 14:10:07,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7259 states. [2018-12-24 14:10:07,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7259 states to 7259 states and 51642 transitions. [2018-12-24 14:10:07,458 INFO L78 Accepts]: Start accepts. Automaton has 7259 states and 51642 transitions. Word has length 7 [2018-12-24 14:10:07,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:10:07,458 INFO L480 AbstractCegarLoop]: Abstraction has 7259 states and 51642 transitions. [2018-12-24 14:10:07,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:10:07,458 INFO L276 IsEmpty]: Start isEmpty. Operand 7259 states and 51642 transitions. [2018-12-24 14:10:07,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:10:07,464 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:10:07,464 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:10:07,464 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:10:07,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:10:07,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1924490204, now seen corresponding path program 2 times [2018-12-24 14:10:07,464 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:10:07,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:10:07,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:10:07,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:10:07,465 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:10:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:10:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:10:07,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:10:07,602 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:10:07,602 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:10:07,602 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:10:07,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:10:07,602 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:10:07,771 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:10:07,771 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:10:07,776 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:10:07,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:10:07,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:10:07,797 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:10:07,800 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:10:07,803 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:07,804 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:07,805 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:10:07,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:07,810 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:07,811 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:07,812 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:10:07,816 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:07,817 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:07,818 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:07,819 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:07,819 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:10:07,823 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:07,824 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:07,826 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:07,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:07,828 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:07,829 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:10:07,829 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:07,869 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:07,892 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:07,909 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:07,922 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:07,934 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:07,966 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:07,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:10:08,002 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,003 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,004 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:10:08,044 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,045 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,046 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,047 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,048 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:10:08,098 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,100 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,103 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,104 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:10:08,163 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,164 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,166 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,167 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,168 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,169 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,170 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,171 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,171 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:10:08,172 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:08,197 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:08,221 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:08,246 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:08,271 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:08,313 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:10:08,314 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:10:08,350 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,351 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:10:08,351 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:08,394 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:10:08,394 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:10:08,422 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,423 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,424 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,425 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,426 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,427 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,428 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,429 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,430 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:10:08,431 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:08,479 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:10:08,479 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2018-12-24 14:10:08,508 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,509 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,510 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,511 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,512 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,514 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,515 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,516 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,518 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,519 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,520 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,521 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,522 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:10:08,522 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2018-12-24 14:10:08,523 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:08,570 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:10:08,570 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:49 [2018-12-24 14:10:08,600 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,601 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,605 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,606 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,607 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,609 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,611 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,612 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,613 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,614 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,615 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,616 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:08,616 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:10:08,617 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2018-12-24 14:10:08,618 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:08,664 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:10:08,664 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:49 [2018-12-24 14:10:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:10:08,696 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:10:08,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:10:08,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:10:08,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2018-12-24 14:10:08,760 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:10:08,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-24 14:10:08,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-24 14:10:08,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:10:08,760 INFO L87 Difference]: Start difference. First operand 7259 states and 51642 transitions. Second operand 11 states. [2018-12-24 14:10:26,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:10:26,317 INFO L93 Difference]: Finished difference Result 9936 states and 70364 transitions. [2018-12-24 14:10:26,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-24 14:10:26,317 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2018-12-24 14:10:26,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:10:26,351 INFO L225 Difference]: With dead ends: 9936 [2018-12-24 14:10:26,352 INFO L226 Difference]: Without dead ends: 9935 [2018-12-24 14:10:26,354 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2018-12-24 14:10:26,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9935 states. [2018-12-24 14:10:41,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9935 to 8951. [2018-12-24 14:10:41,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8951 states. [2018-12-24 14:10:41,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8951 states to 8951 states and 63743 transitions. [2018-12-24 14:10:41,381 INFO L78 Accepts]: Start accepts. Automaton has 8951 states and 63743 transitions. Word has length 7 [2018-12-24 14:10:41,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:10:41,381 INFO L480 AbstractCegarLoop]: Abstraction has 8951 states and 63743 transitions. [2018-12-24 14:10:41,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-24 14:10:41,381 INFO L276 IsEmpty]: Start isEmpty. Operand 8951 states and 63743 transitions. [2018-12-24 14:10:41,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:10:41,388 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:10:41,388 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:10:41,388 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:10:41,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:10:41,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1928257388, now seen corresponding path program 1 times [2018-12-24 14:10:41,388 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:10:41,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:10:41,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:10:41,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:10:41,389 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:10:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:10:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:10:41,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:10:41,481 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:10:41,481 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:10:41,481 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [24], [28], [30], [31] [2018-12-24 14:10:41,482 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:10:41,482 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:10:41,483 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:10:41,483 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:10:41,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:10:41,484 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:10:41,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:10:41,484 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:10:41,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:10:41,492 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:10:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:10:41,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:10:41,501 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2018-12-24 14:10:41,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:41,519 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:41,520 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2018-12-24 14:10:41,556 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:41,557 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:41,559 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:41,560 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:41,560 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2018-12-24 14:10:41,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:41,605 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:41,606 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:41,607 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:41,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:41,610 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:41,611 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:10:41,668 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:41,669 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:41,669 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:41,670 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:41,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:41,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:41,674 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:41,676 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:41,676 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:10:41,677 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:41,704 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:41,727 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:41,751 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:41,777 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:41,809 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:10:41,812 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:10:41,816 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:10:41,819 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:10:41,822 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:10:41,826 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:10:41,826 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:41,858 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:41,875 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:41,889 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:41,901 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:41,912 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:41,953 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:10:41,953 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2018-12-24 14:10:41,983 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:41,991 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:10:41,992 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:10:42,129 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:10:42,130 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:138 [2018-12-24 14:10:42,178 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:42,178 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:42,179 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:10:42,179 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2018-12-24 14:10:42,180 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:42,208 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:10:42,209 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:42 [2018-12-24 14:10:42,231 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:42,232 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:42,233 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:42,234 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:42,235 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:42,236 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:42,237 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:42,238 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:42,239 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:42,239 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2018-12-24 14:10:42,240 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:42,271 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:10:42,271 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:52, output treesize:34 [2018-12-24 14:10:42,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:10:42,293 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:10:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:10:42,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:10:42,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:10:42,339 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:10:42,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:10:42,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:10:42,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:10:42,339 INFO L87 Difference]: Start difference. First operand 8951 states and 63743 transitions. Second operand 10 states. [2018-12-24 14:10:58,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:10:58,285 INFO L93 Difference]: Finished difference Result 9235 states and 65371 transitions. [2018-12-24 14:10:58,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:10:58,286 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2018-12-24 14:10:58,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:10:58,316 INFO L225 Difference]: With dead ends: 9235 [2018-12-24 14:10:58,316 INFO L226 Difference]: Without dead ends: 9232 [2018-12-24 14:10:58,318 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:10:58,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9232 states. [2018-12-24 14:11:14,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9232 to 9044. [2018-12-24 14:11:14,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9044 states. [2018-12-24 14:11:14,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9044 states to 9044 states and 64394 transitions. [2018-12-24 14:11:14,218 INFO L78 Accepts]: Start accepts. Automaton has 9044 states and 64394 transitions. Word has length 7 [2018-12-24 14:11:14,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:11:14,218 INFO L480 AbstractCegarLoop]: Abstraction has 9044 states and 64394 transitions. [2018-12-24 14:11:14,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:11:14,218 INFO L276 IsEmpty]: Start isEmpty. Operand 9044 states and 64394 transitions. [2018-12-24 14:11:14,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:11:14,225 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:11:14,225 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:11:14,226 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:11:14,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:11:14,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1928378538, now seen corresponding path program 1 times [2018-12-24 14:11:14,226 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:11:14,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:11:14,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:11:14,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:11:14,227 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:11:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:11:14,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:11:14,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:11:14,304 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:11:14,304 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:11:14,304 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [28], [30], [32], [33] [2018-12-24 14:11:14,305 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:11:14,305 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:11:14,306 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:11:14,306 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:11:14,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:11:14,307 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:11:14,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:11:14,307 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 14:11:14,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:11:14,315 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:11:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:11:14,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:11:14,337 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:11:14,358 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:14,359 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:14,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:11:14,389 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:14,391 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:14,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:14,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:14,394 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:11:14,431 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:14,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:14,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:14,433 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:14,434 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:14,436 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:14,437 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:11:14,437 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:11:14,451 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:11:14,465 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:11:14,481 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:11:14,503 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:11:14,506 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:11:14,509 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:11:14,513 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:11:14,518 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:11:14,525 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:11:14,526 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:11:14,550 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:11:14,567 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:11:14,581 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:11:14,592 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:11:14,603 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:11:14,632 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:11:14,632 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2018-12-24 14:11:14,670 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:14,678 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:11:14,678 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:11:14,766 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:11:14,766 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:88 [2018-12-24 14:11:14,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:14,808 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:14,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:14,810 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:14,810 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:11:14,811 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 59 [2018-12-24 14:11:14,811 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:11:14,831 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:11:14,831 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:29 [2018-12-24 14:11:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:11:14,864 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:11:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:11:14,907 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:11:14,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:11:14,907 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:11:14,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:11:14,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:11:14,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:11:14,908 INFO L87 Difference]: Start difference. First operand 9044 states and 64394 transitions. Second operand 8 states. [2018-12-24 14:11:29,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:11:29,898 INFO L93 Difference]: Finished difference Result 9065 states and 64420 transitions. [2018-12-24 14:11:29,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:11:29,898 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-12-24 14:11:29,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:11:29,928 INFO L225 Difference]: With dead ends: 9065 [2018-12-24 14:11:29,928 INFO L226 Difference]: Without dead ends: 9064 [2018-12-24 14:11:29,930 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:11:29,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9064 states. [2018-12-24 14:11:45,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9064 to 9045. [2018-12-24 14:11:45,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9045 states. [2018-12-24 14:11:45,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9045 states to 9045 states and 64401 transitions. [2018-12-24 14:11:45,676 INFO L78 Accepts]: Start accepts. Automaton has 9045 states and 64401 transitions. Word has length 7 [2018-12-24 14:11:45,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:11:45,676 INFO L480 AbstractCegarLoop]: Abstraction has 9045 states and 64401 transitions. [2018-12-24 14:11:45,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:11:45,676 INFO L276 IsEmpty]: Start isEmpty. Operand 9045 states and 64401 transitions. [2018-12-24 14:11:45,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:11:45,686 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:11:45,686 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:11:45,686 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:11:45,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:11:45,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1904967206, now seen corresponding path program 1 times [2018-12-24 14:11:45,687 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:11:45,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:11:45,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:11:45,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:11:45,688 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:11:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:11:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:11:45,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:11:45,762 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:11:45,762 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:11:45,762 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [22], [24], [27] [2018-12-24 14:11:45,762 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:11:45,763 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:11:45,764 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:11:45,764 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 5 fixpoints after 5 different actions. Largest state had 0 variables. [2018-12-24 14:11:45,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:11:45,764 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:11:45,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:11:45,765 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 14:11:45,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:11:45,775 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:11:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:11:45,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:11:45,804 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:45,805 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:11:45,842 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:45,845 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:45,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:11:45,886 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:45,888 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:45,890 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:45,892 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:45,892 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:11:45,944 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:45,945 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:45,947 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:45,948 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:45,949 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:45,951 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:45,951 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:11:46,011 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,014 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,015 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,017 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,021 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,022 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:11:46,022 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:11:46,052 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:11:46,082 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:11:46,112 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:11:46,143 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:11:46,182 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:11:46,188 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:11:46,190 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:11:46,193 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:11:46,196 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:11:46,200 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:11:46,200 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:11:46,234 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:11:46,254 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:11:46,269 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:11:46,282 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:11:46,293 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:11:46,336 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:11:46,336 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:92, output treesize:91 [2018-12-24 14:11:46,387 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,388 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:11:46,388 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:11:46,431 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:11:46,431 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:101, output treesize:71 [2018-12-24 14:11:46,474 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,474 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,475 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,476 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,477 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,481 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2018-12-24 14:11:46,481 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:11:46,525 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:11:46,525 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:81, output treesize:55 [2018-12-24 14:11:46,562 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,614 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,615 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,616 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,617 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,617 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,618 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,619 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,620 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,621 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,622 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:11:46,623 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,624 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2018-12-24 14:11:46,624 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:11:46,671 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:11:46,671 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:67, output treesize:47 [2018-12-24 14:11:46,702 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,703 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,704 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,705 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,706 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,707 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,708 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,709 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,710 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,711 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,712 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,713 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,714 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,715 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:11:46,716 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,716 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 124 [2018-12-24 14:11:46,717 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:11:46,765 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:11:46,766 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:61, output treesize:49 [2018-12-24 14:11:46,796 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,796 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,798 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,799 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,800 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,801 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,802 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,803 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,805 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,806 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,808 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:11:46,810 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:11:46,811 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 127 [2018-12-24 14:11:46,811 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:11:46,858 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:11:46,859 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:53 [2018-12-24 14:11:46,886 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:11:46,886 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:11:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:11:46,998 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:11:46,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2018-12-24 14:11:46,999 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:11:46,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-24 14:11:46,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-24 14:11:46,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2018-12-24 14:11:46,999 INFO L87 Difference]: Start difference. First operand 9045 states and 64401 transitions. Second operand 14 states. [2018-12-24 14:12:06,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:12:06,205 INFO L93 Difference]: Finished difference Result 9411 states and 66754 transitions. [2018-12-24 14:12:06,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:12:06,206 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 7 [2018-12-24 14:12:06,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:12:06,241 INFO L225 Difference]: With dead ends: 9411 [2018-12-24 14:12:06,241 INFO L226 Difference]: Without dead ends: 9409 [2018-12-24 14:12:06,244 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2018-12-24 14:12:06,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9409 states. [2018-12-24 14:12:21,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9409 to 8693. [2018-12-24 14:12:21,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8693 states. [2018-12-24 14:12:21,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8693 states to 8693 states and 61400 transitions. [2018-12-24 14:12:21,960 INFO L78 Accepts]: Start accepts. Automaton has 8693 states and 61400 transitions. Word has length 7 [2018-12-24 14:12:21,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:12:21,960 INFO L480 AbstractCegarLoop]: Abstraction has 8693 states and 61400 transitions. [2018-12-24 14:12:21,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-24 14:12:21,961 INFO L276 IsEmpty]: Start isEmpty. Operand 8693 states and 61400 transitions. [2018-12-24 14:12:21,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:12:21,968 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:12:21,968 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:12:21,969 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:12:21,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:12:21,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1916458534, now seen corresponding path program 1 times [2018-12-24 14:12:21,969 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:12:21,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:12:21,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:12:21,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:12:21,970 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:12:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:12:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:12:22,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:12:22,109 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:12:22,109 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:12:22,109 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [22], [24], [27] [2018-12-24 14:12:22,111 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:12:22,111 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:12:22,112 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:12:22,112 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 5 fixpoints after 5 different actions. Largest state had 0 variables. [2018-12-24 14:12:22,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:12:22,113 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:12:22,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:12:22,113 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:12:22,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:12:22,129 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:12:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:12:22,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:12:22,161 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,162 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:12:22,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,201 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:12:22,241 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,242 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,243 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,244 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,245 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:12:22,293 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,294 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,295 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,295 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,296 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,298 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,298 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:12:22,361 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,362 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,363 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,364 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,365 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,367 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,369 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:12:22,369 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:12:22,395 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:12:22,421 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:12:22,446 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:12:22,472 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:12:22,506 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:12:22,508 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:12:22,511 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:12:22,514 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:12:22,516 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:12:22,518 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:12:22,519 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:12:22,551 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:12:22,570 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:12:22,586 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:12:22,598 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:12:22,609 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:12:22,652 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:12:22,653 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2018-12-24 14:12:22,699 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,699 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:12:22,700 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:12:22,742 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:12:22,742 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2018-12-24 14:12:22,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,783 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,784 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,785 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,786 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,787 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,788 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,788 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:12:22,789 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2018-12-24 14:12:22,789 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:12:22,834 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:12:22,834 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:81, output treesize:59 [2018-12-24 14:12:22,870 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,870 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,871 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,872 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,873 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,874 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,875 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,876 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,878 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,879 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,880 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,880 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:12:22,881 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:12:22,926 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:12:22,927 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:69, output treesize:47 [2018-12-24 14:12:22,952 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,953 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,954 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,955 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,958 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,959 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,960 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,961 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,962 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,963 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,964 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,966 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:22,967 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:12:22,968 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 124 [2018-12-24 14:12:22,969 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:12:23,017 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:12:23,017 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:59, output treesize:45 [2018-12-24 14:12:23,045 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:23,046 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:23,047 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:23,048 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:23,049 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:23,050 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:23,051 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:23,052 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:23,054 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:23,055 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:23,056 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:23,057 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:23,058 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:23,059 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:23,060 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:12:23,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:23,061 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 120 [2018-12-24 14:12:23,062 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:12:23,108 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:12:23,109 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:57, output treesize:49 [2018-12-24 14:12:23,135 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:12:23,135 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:12:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:12:23,231 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:12:23,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2018-12-24 14:12:23,232 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:12:23,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-24 14:12:23,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-24 14:12:23,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2018-12-24 14:12:23,232 INFO L87 Difference]: Start difference. First operand 8693 states and 61400 transitions. Second operand 14 states. [2018-12-24 14:12:40,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:12:40,315 INFO L93 Difference]: Finished difference Result 8797 states and 61626 transitions. [2018-12-24 14:12:40,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-24 14:12:40,315 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 7 [2018-12-24 14:12:40,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:12:40,345 INFO L225 Difference]: With dead ends: 8797 [2018-12-24 14:12:40,346 INFO L226 Difference]: Without dead ends: 8791 [2018-12-24 14:12:40,348 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2018-12-24 14:12:40,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8791 states. [2018-12-24 14:12:48,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8791 to 1900. [2018-12-24 14:12:48,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1900 states. [2018-12-24 14:12:48,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 13072 transitions. [2018-12-24 14:12:48,951 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 13072 transitions. Word has length 7 [2018-12-24 14:12:48,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:12:48,951 INFO L480 AbstractCegarLoop]: Abstraction has 1900 states and 13072 transitions. [2018-12-24 14:12:48,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-24 14:12:48,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 13072 transitions. [2018-12-24 14:12:48,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:12:48,954 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:12:48,954 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:12:48,954 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:12:48,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:12:48,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1899825356, now seen corresponding path program 1 times [2018-12-24 14:12:48,954 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:12:48,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:12:48,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:12:48,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:12:48,955 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:12:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:12:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:12:49,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:12:49,015 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:12:49,015 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:12:49,015 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [24], [28], [30], [31] [2018-12-24 14:12:49,016 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:12:49,016 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:12:49,017 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:12:49,018 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:12:49,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:12:49,018 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:12:49,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:12:49,018 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:12:49,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:12:49,027 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:12:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:12:49,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:12:49,036 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2018-12-24 14:12:49,052 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,054 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,055 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2018-12-24 14:12:49,090 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,092 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,094 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,095 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,096 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2018-12-24 14:12:49,140 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,141 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,142 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,143 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,144 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,146 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:12:49,205 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,206 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,207 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,209 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,211 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,214 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,214 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:12:49,215 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:12:49,239 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:12:49,262 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:12:49,286 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:12:49,311 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:12:49,344 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:12:49,347 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:12:49,351 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:12:49,354 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:12:49,358 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:12:49,362 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:12:49,362 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:12:49,392 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:12:49,410 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:12:49,424 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:12:49,435 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:12:49,447 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:12:49,487 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:12:49,487 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2018-12-24 14:12:49,521 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,522 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2018-12-24 14:12:49,522 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:12:49,562 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:12:49,563 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2018-12-24 14:12:49,590 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,592 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,593 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,594 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,597 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,598 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,599 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 107 [2018-12-24 14:12:49,599 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:12:49,643 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:12:49,643 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:51 [2018-12-24 14:12:49,670 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,670 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,672 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,674 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,675 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,676 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,677 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,680 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,681 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,682 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,683 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,684 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:12:49,685 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:12:49,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 134 [2018-12-24 14:12:49,695 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:12:49,851 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2018-12-24 14:12:49,852 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:90 [2018-12-24 14:12:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:12:49,893 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:12:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:12:49,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:12:49,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:12:49,956 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:12:49,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:12:49,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:12:49,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:12:49,957 INFO L87 Difference]: Start difference. First operand 1900 states and 13072 transitions. Second operand 10 states. [2018-12-24 14:13:00,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:13:00,505 INFO L93 Difference]: Finished difference Result 1963 states and 13288 transitions. [2018-12-24 14:13:00,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:13:00,505 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2018-12-24 14:13:00,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:13:00,510 INFO L225 Difference]: With dead ends: 1963 [2018-12-24 14:13:00,511 INFO L226 Difference]: Without dead ends: 1962 [2018-12-24 14:13:00,511 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:13:00,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2018-12-24 14:13:09,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1925. [2018-12-24 14:13:09,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1925 states. [2018-12-24 14:13:09,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1925 states to 1925 states and 13247 transitions. [2018-12-24 14:13:09,057 INFO L78 Accepts]: Start accepts. Automaton has 1925 states and 13247 transitions. Word has length 7 [2018-12-24 14:13:09,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:13:09,057 INFO L480 AbstractCegarLoop]: Abstraction has 1925 states and 13247 transitions. [2018-12-24 14:13:09,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:13:09,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1925 states and 13247 transitions. [2018-12-24 14:13:09,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:13:09,061 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:13:09,061 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:13:09,061 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:13:09,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:13:09,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1912516322, now seen corresponding path program 1 times [2018-12-24 14:13:09,062 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:13:09,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:13:09,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:13:09,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:13:09,063 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:13:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:13:09,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:13:09,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:13:09,149 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:13:09,149 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:13:09,150 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [22], [28], [30], [31] [2018-12-24 14:13:09,150 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:13:09,151 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:13:09,152 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:13:09,152 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:13:09,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:13:09,152 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:13:09,153 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:13:09,153 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:13:09,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:13:09,166 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:13:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:13:09,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:13:09,175 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:13:09,177 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:13:09,181 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,183 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,183 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:13:09,188 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,189 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,190 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,191 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:13:09,195 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,200 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,202 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:13:09,211 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:13:09,212 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:13:09,238 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:13:09,258 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:13:09,273 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:13:09,286 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:13:09,298 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:13:09,321 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:13:09,334 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,336 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,337 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:13:09,367 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,370 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,371 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,372 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:13:09,409 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,410 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,411 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,412 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,413 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,415 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,416 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:13:09,416 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:13:09,431 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:13:09,444 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:13:09,460 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:13:09,488 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:13:09,489 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:64, output treesize:67 [2018-12-24 14:13:09,531 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,532 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 51 [2018-12-24 14:13:09,532 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:13:09,549 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:13:09,550 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:33 [2018-12-24 14:13:09,570 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,571 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,572 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,573 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,573 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,574 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,575 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 65 [2018-12-24 14:13:09,575 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:13:09,597 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:13:09,597 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:25 [2018-12-24 14:13:09,618 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,619 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,620 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,620 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,621 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,622 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,623 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,624 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,625 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,626 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:09,626 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:13:09,627 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 78 [2018-12-24 14:13:09,627 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:13:09,649 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:13:09,649 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:27 [2018-12-24 14:13:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:13:09,668 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:13:09,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:13:09,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:13:09,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2018-12-24 14:13:09,731 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:13:09,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-24 14:13:09,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-24 14:13:09,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:13:09,732 INFO L87 Difference]: Start difference. First operand 1925 states and 13247 transitions. Second operand 11 states. [2018-12-24 14:13:18,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:13:18,455 INFO L93 Difference]: Finished difference Result 2000 states and 13456 transitions. [2018-12-24 14:13:18,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:13:18,455 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2018-12-24 14:13:18,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:13:18,461 INFO L225 Difference]: With dead ends: 2000 [2018-12-24 14:13:18,461 INFO L226 Difference]: Without dead ends: 1999 [2018-12-24 14:13:18,462 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2018-12-24 14:13:18,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1999 states. [2018-12-24 14:13:27,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1999 to 1945. [2018-12-24 14:13:27,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1945 states. [2018-12-24 14:13:27,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 13387 transitions. [2018-12-24 14:13:27,125 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 13387 transitions. Word has length 7 [2018-12-24 14:13:27,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:13:27,125 INFO L480 AbstractCegarLoop]: Abstraction has 1945 states and 13387 transitions. [2018-12-24 14:13:27,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-24 14:13:27,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 13387 transitions. [2018-12-24 14:13:27,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:13:27,128 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:13:27,128 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:13:27,128 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:13:27,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:13:27,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1895531480, now seen corresponding path program 1 times [2018-12-24 14:13:27,128 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:13:27,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:13:27,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:13:27,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:13:27,129 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:13:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:13:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:13:27,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:13:27,147 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:13:27,148 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:13:27,148 INFO L207 CegarAbsIntRunner]: [0], [22], [28], [30], [32], [34], [35] [2018-12-24 14:13:27,148 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:13:27,148 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:13:27,150 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:13:27,150 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 14:13:27,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:13:27,150 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:13:27,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:13:27,150 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:13:27,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:13:27,159 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:13:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:13:27,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:13:27,167 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:13:27,169 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:13:27,174 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2018-12-24 14:13:27,188 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2018-12-24 14:13:27,198 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2018-12-24 14:13:27,219 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2018-12-24 14:13:27,219 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:13:27,229 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:13:27,240 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:13:27,250 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:13:27,261 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:13:27,272 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:13:27,283 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:13:27,283 INFO L202 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:21, output treesize:31 [2018-12-24 14:13:27,287 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:13:27,288 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2018-12-24 14:13:27,288 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:13:27,289 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:13:27,289 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:5 [2018-12-24 14:13:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:13:27,293 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:13:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:13:27,314 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-24 14:13:27,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 4 [2018-12-24 14:13:27,314 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:13:27,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 14:13:27,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 14:13:27,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-12-24 14:13:27,314 INFO L87 Difference]: Start difference. First operand 1945 states and 13387 transitions. Second operand 4 states.