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-7-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b7bd044-m [2019-01-18 17:39:17,425 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-18 17:39:17,427 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-18 17:39:17,439 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-01-18 17:39:17,472 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 [2019-01-18 17:39:17,484 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-18 17:39:17,485 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-18 17:39:17,486 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-18 17:39:17,486 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-18 17:39:17,486 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-18 17:39:17,486 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-18 17:39:17,486 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-18 17:39:17,487 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-18 17:39:17,487 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-18 17:39:17,487 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-18 17:39:17,487 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-18 17:39:17,487 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-18 17:39:17,488 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-18 17:39:17,488 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-18 17:39:17,489 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-18 17:39:17,489 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-18 17:39:17,489 INFO L133 SettingsManager]: * Use SBE=true [2019-01-18 17:39:17,489 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-18 17:39:17,489 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-18 17:39:17,490 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-18 17:39:17,490 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-18 17:39:17,490 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-18 17:39:17,490 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-18 17:39:17,490 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-18 17:39:17,491 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-18 17:39:17,491 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-18 17:39:17,491 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-18 17:39:17,491 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-18 17:39:17,491 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-18 17:39:17,492 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-18 17:39:17,492 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-18 17:39:17,492 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-18 17:39:17,492 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-18 17:39:17,493 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-18 17:39:17,493 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-18 17:39:17,493 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-18 17:39:17,493 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-18 17:39:17,493 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-18 17:39:17,493 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-18 17:39:17,494 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-18 17:39:17,548 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-18 17:39:17,559 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-18 17:39:17,562 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-18 17:39:17,564 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-18 17:39:17,564 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-18 17:39:17,565 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-unlimited.bpl [2019-01-18 17:39:17,566 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-unlimited.bpl' [2019-01-18 17:39:17,599 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-18 17:39:17,601 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-18 17:39:17,602 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-18 17:39:17,602 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-18 17:39:17,602 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-18 17:39:17,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:17" (1/1) ... [2019-01-18 17:39:17,631 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:17" (1/1) ... [2019-01-18 17:39:17,657 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-18 17:39:17,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-18 17:39:17,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-18 17:39:17,659 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-18 17:39:17,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:17" (1/1) ... [2019-01-18 17:39:17,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:17" (1/1) ... [2019-01-18 17:39:17,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:17" (1/1) ... [2019-01-18 17:39:17,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:17" (1/1) ... [2019-01-18 17:39:17,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:17" (1/1) ... [2019-01-18 17:39:17,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:17" (1/1) ... [2019-01-18 17:39:17,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:17" (1/1) ... [2019-01-18 17:39:17,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-18 17:39:17,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-18 17:39:17,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-18 17:39:17,684 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-18 17:39:17,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-18 17:39:17,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-18 17:39:17,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-18 17:39:18,126 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-18 17:39:18,127 INFO L286 CfgBuilder]: Removed 17 assue(true) statements. [2019-01-18 17:39:18,128 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:39:18 BoogieIcfgContainer [2019-01-18 17:39:18,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-18 17:39:18,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-18 17:39:18,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-18 17:39:18,133 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-18 17:39:18,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:17" (1/2) ... [2019-01-18 17:39:18,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562dd590 and model type speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 05:39:18, skipping insertion in model container [2019-01-18 17:39:18,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:39:18" (2/2) ... [2019-01-18 17:39:18,136 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-7-unlimited.bpl [2019-01-18 17:39:18,146 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-18 17:39:18,154 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-01-18 17:39:18,172 INFO L257 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-01-18 17:39:18,212 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-18 17:39:18,212 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-18 17:39:18,212 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-18 17:39:18,213 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-18 17:39:18,213 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-18 17:39:18,213 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-18 17:39:18,213 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-18 17:39:18,214 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-18 17:39:18,233 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-01-18 17:39:18,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-18 17:39:18,248 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:18,249 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-18 17:39:18,252 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:18,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:18,261 INFO L82 PathProgramCache]: Analyzing trace with hash 992, now seen corresponding path program 1 times [2019-01-18 17:39:18,263 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:18,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:18,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:18,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:18,307 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:18,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:18,466 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-18 17:39:18,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-18 17:39:18,467 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 17:39:18,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-18 17:39:18,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-18 17:39:18,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-18 17:39:18,494 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-01-18 17:39:18,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:18,702 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2019-01-18 17:39:18,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-18 17:39:18,704 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-18 17:39:18,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:18,718 INFO L225 Difference]: With dead ends: 33 [2019-01-18 17:39:18,718 INFO L226 Difference]: Without dead ends: 28 [2019-01-18 17:39:18,721 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-18 17:39:18,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-01-18 17:39:18,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 16. [2019-01-18 17:39:18,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-01-18 17:39:18,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 29 transitions. [2019-01-18 17:39:18,759 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 29 transitions. Word has length 2 [2019-01-18 17:39:18,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:18,761 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 29 transitions. [2019-01-18 17:39:18,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-18 17:39:18,761 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 29 transitions. [2019-01-18 17:39:18,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 17:39:18,762 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:18,762 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 17:39:18,762 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:18,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:18,763 INFO L82 PathProgramCache]: Analyzing trace with hash 30816, now seen corresponding path program 1 times [2019-01-18 17:39:18,763 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:18,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:18,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:18,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:18,765 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:18,893 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-18 17:39:18,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-18 17:39:18,893 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 17:39:18,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-18 17:39:18,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-18 17:39:18,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-18 17:39:18,896 INFO L87 Difference]: Start difference. First operand 16 states and 29 transitions. Second operand 3 states. [2019-01-18 17:39:19,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:19,261 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2019-01-18 17:39:19,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-18 17:39:19,262 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-18 17:39:19,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:19,263 INFO L225 Difference]: With dead ends: 28 [2019-01-18 17:39:19,263 INFO L226 Difference]: Without dead ends: 27 [2019-01-18 17:39:19,264 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-18 17:39:19,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-01-18 17:39:19,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2019-01-18 17:39:19,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-01-18 17:39:19,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 30 transitions. [2019-01-18 17:39:19,269 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 30 transitions. Word has length 3 [2019-01-18 17:39:19,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:19,269 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 30 transitions. [2019-01-18 17:39:19,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-18 17:39:19,270 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 30 transitions. [2019-01-18 17:39:19,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 17:39:19,270 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:19,270 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 17:39:19,271 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:19,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:19,271 INFO L82 PathProgramCache]: Analyzing trace with hash 30380, now seen corresponding path program 1 times [2019-01-18 17:39:19,272 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:19,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:19,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:19,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:19,273 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:19,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:19,433 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:19,434 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 17:39:19,435 INFO L207 CegarAbsIntRunner]: [0], [18], [31] [2019-01-18 17:39:19,469 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:19,470 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:19,537 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:19,538 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 74 root evaluator evaluations with a maximum evaluation depth of 2. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:39:19,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:19,545 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:19,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:19,545 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:39:19,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:19,564 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:19,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:19,824 WARN L181 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-01-18 17:39:19,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,852 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 [2019-01-18 17:39:20,029 WARN L181 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-01-18 17:39:20,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,095 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 [2019-01-18 17:39:20,214 WARN L181 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2019-01-18 17:39:20,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,246 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 [2019-01-18 17:39:20,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,407 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-18 17:39:20,825 WARN L181 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2019-01-18 17:39:20,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,861 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 [2019-01-18 17:39:20,862 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:20,905 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:20,952 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:20,997 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:21,045 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:21,213 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 24 treesize of output 27 [2019-01-18 17:39:21,220 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-18 17:39:21,228 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 29 treesize of output 43 [2019-01-18 17:39:21,242 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 31 treesize of output 57 [2019-01-18 17:39:21,253 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 33 treesize of output 75 [2019-01-18 17:39:21,264 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:39:21,297 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 37 treesize of output 96 [2019-01-18 17:39:21,298 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:21,442 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:21,523 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:21,581 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:21,599 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:21,617 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:21,632 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:21,706 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. [2019-01-18 17:39:21,707 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2019-01-18 17:39:21,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:21,799 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 [2019-01-18 17:39:21,801 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:21,932 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. [2019-01-18 17:39:21,932 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2019-01-18 17:39:21,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:21,982 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:22,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:22,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 17:39:22,049 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:22,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 17:39:22,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 17:39:22,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:39:22,050 INFO L87 Difference]: Start difference. First operand 17 states and 30 transitions. Second operand 6 states. [2019-01-18 17:39:22,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:22,448 INFO L93 Difference]: Finished difference Result 54 states and 79 transitions. [2019-01-18 17:39:22,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 17:39:22,450 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-18 17:39:22,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:22,452 INFO L225 Difference]: With dead ends: 54 [2019-01-18 17:39:22,453 INFO L226 Difference]: Without dead ends: 52 [2019-01-18 17:39:22,453 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 [2019-01-18 17:39:22,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-01-18 17:39:22,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 20. [2019-01-18 17:39:22,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-01-18 17:39:22,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 41 transitions. [2019-01-18 17:39:22,460 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 41 transitions. Word has length 3 [2019-01-18 17:39:22,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:22,461 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 41 transitions. [2019-01-18 17:39:22,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 17:39:22,461 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 41 transitions. [2019-01-18 17:39:22,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 17:39:22,461 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:22,461 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 17:39:22,462 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:22,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:22,462 INFO L82 PathProgramCache]: Analyzing trace with hash 30008, now seen corresponding path program 1 times [2019-01-18 17:39:22,463 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:22,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:22,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:22,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:22,464 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:22,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:22,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:22,564 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:22,564 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 17:39:22,564 INFO L207 CegarAbsIntRunner]: [0], [6], [31] [2019-01-18 17:39:22,567 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:22,567 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:22,576 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:22,576 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 74 root evaluator evaluations with a maximum evaluation depth of 2. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:39:22,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:22,577 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:22,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:22,577 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:39:22,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:22,587 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:22,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:22,631 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 24 treesize of output 27 [2019-01-18 17:39:22,636 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 27 treesize of output 33 [2019-01-18 17:39:22,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,652 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 29 treesize of output 43 [2019-01-18 17:39:22,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,736 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 31 treesize of output 57 [2019-01-18 17:39:22,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,760 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 33 treesize of output 75 [2019-01-18 17:39:22,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,808 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:39:22,849 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-18 17:39:22,850 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:22,897 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:22,962 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:22,987 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:23,009 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:23,026 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:23,044 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:23,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,089 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 [2019-01-18 17:39:23,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,151 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 [2019-01-18 17:39:23,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,208 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 [2019-01-18 17:39:23,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,281 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 [2019-01-18 17:39:23,491 WARN L181 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2019-01-18 17:39:23,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,504 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 [2019-01-18 17:39:23,505 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:23,529 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:23,555 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:23,580 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:23,620 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:23,671 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:23,672 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 8 variables, input treesize:95, output treesize:96 [2019-01-18 17:39:23,823 WARN L181 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2019-01-18 17:39:23,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,864 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 [2019-01-18 17:39:23,865 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:23,946 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. [2019-01-18 17:39:23,946 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2019-01-18 17:39:23,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:23,966 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:23,998 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-18 17:39:23,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-18 17:39:23,998 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 17:39:23,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-18 17:39:23,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-18 17:39:23,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-18 17:39:23,999 INFO L87 Difference]: Start difference. First operand 20 states and 41 transitions. Second operand 4 states. [2019-01-18 17:39:24,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:24,080 INFO L93 Difference]: Finished difference Result 25 states and 67 transitions. [2019-01-18 17:39:24,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-18 17:39:24,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-18 17:39:24,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:24,082 INFO L225 Difference]: With dead ends: 25 [2019-01-18 17:39:24,082 INFO L226 Difference]: Without dead ends: 24 [2019-01-18 17:39:24,083 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-18 17:39:24,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-01-18 17:39:24,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-01-18 17:39:24,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-01-18 17:39:24,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 66 transitions. [2019-01-18 17:39:24,090 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 66 transitions. Word has length 3 [2019-01-18 17:39:24,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:24,091 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 66 transitions. [2019-01-18 17:39:24,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-18 17:39:24,091 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 66 transitions. [2019-01-18 17:39:24,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 17:39:24,092 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:24,092 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 17:39:24,092 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:24,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:24,093 INFO L82 PathProgramCache]: Analyzing trace with hash 30132, now seen corresponding path program 1 times [2019-01-18 17:39:24,093 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:24,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:24,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:24,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:24,094 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:24,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:24,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:24,158 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:24,158 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 17:39:24,159 INFO L207 CegarAbsIntRunner]: [0], [10], [31] [2019-01-18 17:39:24,160 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:24,160 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:24,167 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:24,168 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 74 root evaluator evaluations with a maximum evaluation depth of 2. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:39:24,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:24,168 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:24,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:24,169 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:39:24,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:24,179 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:24,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:24,389 WARN L181 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-01-18 17:39:24,403 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 24 treesize of output 27 [2019-01-18 17:39:24,423 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 27 treesize of output 33 [2019-01-18 17:39:24,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,469 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 29 treesize of output 43 [2019-01-18 17:39:24,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,484 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:39:24,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,496 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 33 treesize of output 75 [2019-01-18 17:39:24,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,587 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:39:24,615 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 37 treesize of output 96 [2019-01-18 17:39:24,616 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:24,701 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:24,735 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:24,762 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:24,780 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:24,797 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:24,813 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:24,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,848 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 [2019-01-18 17:39:24,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,888 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 [2019-01-18 17:39:24,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,937 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 [2019-01-18 17:39:25,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,014 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 [2019-01-18 17:39:25,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,089 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 [2019-01-18 17:39:25,090 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:25,115 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:25,140 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:25,167 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:25,193 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:25,244 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. [2019-01-18 17:39:25,245 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2019-01-18 17:39:25,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,295 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 [2019-01-18 17:39:25,296 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:25,341 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. [2019-01-18 17:39:25,342 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2019-01-18 17:39:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:25,365 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:25,428 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:25,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 17:39:25,429 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:25,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 17:39:25,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 17:39:25,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:39:25,430 INFO L87 Difference]: Start difference. First operand 23 states and 66 transitions. Second operand 6 states. [2019-01-18 17:39:25,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:25,737 INFO L93 Difference]: Finished difference Result 57 states and 111 transitions. [2019-01-18 17:39:25,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 17:39:25,738 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-18 17:39:25,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:25,740 INFO L225 Difference]: With dead ends: 57 [2019-01-18 17:39:25,740 INFO L226 Difference]: Without dead ends: 56 [2019-01-18 17:39:25,740 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 [2019-01-18 17:39:25,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-01-18 17:39:25,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 25. [2019-01-18 17:39:25,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-01-18 17:39:25,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 82 transitions. [2019-01-18 17:39:25,748 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 82 transitions. Word has length 3 [2019-01-18 17:39:25,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:25,748 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 82 transitions. [2019-01-18 17:39:25,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 17:39:25,748 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 82 transitions. [2019-01-18 17:39:25,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 17:39:25,749 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:25,749 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 17:39:25,749 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:25,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:25,749 INFO L82 PathProgramCache]: Analyzing trace with hash 30628, now seen corresponding path program 1 times [2019-01-18 17:39:25,749 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:25,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:25,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:25,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:25,750 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:25,823 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:25,823 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:25,824 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 17:39:25,824 INFO L207 CegarAbsIntRunner]: [0], [26], [31] [2019-01-18 17:39:25,826 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:25,826 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:25,833 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:25,833 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 74 root evaluator evaluations with a maximum evaluation depth of 2. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:39:25,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:25,833 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:25,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:25,834 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:39:25,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:25,845 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:25,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:25,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:25,893 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 24 treesize of output 27 [2019-01-18 17:39:25,898 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 27 treesize of output 33 [2019-01-18 17:39:25,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,907 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 29 treesize of output 43 [2019-01-18 17:39:25,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,918 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 31 treesize of output 57 [2019-01-18 17:39:25,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,934 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 33 treesize of output 75 [2019-01-18 17:39:25,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,958 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:39:25,972 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 37 treesize of output 96 [2019-01-18 17:39:25,974 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:26,017 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:26,054 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:26,080 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:26,101 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:26,119 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:26,136 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:26,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:26,176 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 [2019-01-18 17:39:26,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:26,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:26,249 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 [2019-01-18 17:39:26,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:26,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:26,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:26,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:26,312 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 46 treesize of output 72 [2019-01-18 17:39:26,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:26,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:26,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:26,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:26,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:26,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:26,386 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 [2019-01-18 17:39:26,568 WARN L181 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2019-01-18 17:39:26,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:26,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:26,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:26,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:26,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:26,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:26,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:26,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:26,588 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 [2019-01-18 17:39:26,588 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:26,629 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:26,655 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:26,684 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:26,712 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:26,767 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. [2019-01-18 17:39:26,768 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2019-01-18 17:39:26,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:26,836 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 [2019-01-18 17:39:26,837 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:26,915 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. [2019-01-18 17:39:26,916 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2019-01-18 17:39:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:27,105 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:27,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:27,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:27,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 17:39:27,291 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:27,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 17:39:27,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 17:39:27,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:39:27,292 INFO L87 Difference]: Start difference. First operand 25 states and 82 transitions. Second operand 6 states. [2019-01-18 17:39:27,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:27,646 INFO L93 Difference]: Finished difference Result 59 states and 127 transitions. [2019-01-18 17:39:27,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 17:39:27,651 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-18 17:39:27,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:27,652 INFO L225 Difference]: With dead ends: 59 [2019-01-18 17:39:27,652 INFO L226 Difference]: Without dead ends: 57 [2019-01-18 17:39:27,652 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-01-18 17:39:27,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-01-18 17:39:27,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 29. [2019-01-18 17:39:27,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-01-18 17:39:27,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 101 transitions. [2019-01-18 17:39:27,671 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 101 transitions. Word has length 3 [2019-01-18 17:39:27,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:27,671 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 101 transitions. [2019-01-18 17:39:27,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 17:39:27,671 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 101 transitions. [2019-01-18 17:39:27,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:39:27,672 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:27,672 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:39:27,675 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:27,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:27,676 INFO L82 PathProgramCache]: Analyzing trace with hash 955362, now seen corresponding path program 1 times [2019-01-18 17:39:27,676 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:27,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:27,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:27,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:27,677 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:27,836 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-18 17:39:27,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-18 17:39:27,836 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 17:39:27,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-18 17:39:27,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-18 17:39:27,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-01-18 17:39:27,837 INFO L87 Difference]: Start difference. First operand 29 states and 101 transitions. Second operand 4 states. [2019-01-18 17:39:28,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:28,055 INFO L93 Difference]: Finished difference Result 37 states and 114 transitions. [2019-01-18 17:39:28,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-18 17:39:28,055 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-18 17:39:28,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:28,056 INFO L225 Difference]: With dead ends: 37 [2019-01-18 17:39:28,056 INFO L226 Difference]: Without dead ends: 36 [2019-01-18 17:39:28,057 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-01-18 17:39:28,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-01-18 17:39:28,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2019-01-18 17:39:28,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-01-18 17:39:28,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 111 transitions. [2019-01-18 17:39:28,066 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 111 transitions. Word has length 4 [2019-01-18 17:39:28,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:28,066 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 111 transitions. [2019-01-18 17:39:28,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-18 17:39:28,067 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 111 transitions. [2019-01-18 17:39:28,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:39:28,067 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:28,067 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:39:28,068 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:28,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:28,068 INFO L82 PathProgramCache]: Analyzing trace with hash 941844, now seen corresponding path program 1 times [2019-01-18 17:39:28,068 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:28,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:28,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:28,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:28,069 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:28,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:28,201 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:28,201 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:39:28,202 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [33] [2019-01-18 17:39:28,203 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:28,204 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:28,213 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:28,213 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:39:28,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:28,213 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:28,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:28,214 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:39:28,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:28,226 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:28,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:28,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,282 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 [2019-01-18 17:39:28,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,328 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 [2019-01-18 17:39:28,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,388 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-01-18 17:39:28,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,447 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 [2019-01-18 17:39:28,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,521 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 [2019-01-18 17:39:28,522 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:28,549 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:28,576 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:28,604 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:28,641 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:28,677 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 24 treesize of output 27 [2019-01-18 17:39:28,682 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 27 treesize of output 33 [2019-01-18 17:39:28,693 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 29 treesize of output 43 [2019-01-18 17:39:28,697 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:39:28,703 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 33 treesize of output 75 [2019-01-18 17:39:28,711 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:39:28,739 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 37 treesize of output 96 [2019-01-18 17:39:28,739 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:28,778 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:28,808 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:28,832 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:28,850 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:28,864 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:28,879 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:29,290 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. [2019-01-18 17:39:29,291 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2019-01-18 17:39:29,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,334 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 [2019-01-18 17:39:29,335 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:29,378 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. [2019-01-18 17:39:29,379 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2019-01-18 17:39:29,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:29,396 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:29,423 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-18 17:39:29,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-18 17:39:29,423 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 17:39:29,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-18 17:39:29,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-18 17:39:29,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-18 17:39:29,424 INFO L87 Difference]: Start difference. First operand 32 states and 111 transitions. Second operand 4 states. [2019-01-18 17:39:29,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:29,476 INFO L93 Difference]: Finished difference Result 36 states and 122 transitions. [2019-01-18 17:39:29,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-18 17:39:29,477 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-18 17:39:29,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:29,478 INFO L225 Difference]: With dead ends: 36 [2019-01-18 17:39:29,478 INFO L226 Difference]: Without dead ends: 35 [2019-01-18 17:39:29,479 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 [2019-01-18 17:39:29,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-01-18 17:39:29,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-01-18 17:39:29,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-01-18 17:39:29,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 121 transitions. [2019-01-18 17:39:29,486 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 121 transitions. Word has length 4 [2019-01-18 17:39:29,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:29,486 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 121 transitions. [2019-01-18 17:39:29,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-18 17:39:29,486 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 121 transitions. [2019-01-18 17:39:29,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:39:29,487 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:29,487 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:39:29,488 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:29,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:29,488 INFO L82 PathProgramCache]: Analyzing trace with hash 941532, now seen corresponding path program 1 times [2019-01-18 17:39:29,488 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:29,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:29,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:29,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:29,489 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:29,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:29,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:29,641 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:29,641 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:39:29,641 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [31] [2019-01-18 17:39:29,643 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:29,643 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:29,649 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:29,649 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:39:29,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:29,649 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:29,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:29,650 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:39:29,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:29,659 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:29,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:29,688 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 24 treesize of output 27 [2019-01-18 17:39:29,691 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 27 treesize of output 33 [2019-01-18 17:39:29,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,699 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 29 treesize of output 43 [2019-01-18 17:39:29,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,715 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:39:29,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,726 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 33 treesize of output 75 [2019-01-18 17:39:29,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,744 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:39:29,755 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 37 treesize of output 96 [2019-01-18 17:39:29,756 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:29,795 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:29,828 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:29,855 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:29,875 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:29,892 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:29,907 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:29,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,942 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-01-18 17:39:29,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,981 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 [2019-01-18 17:39:30,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,027 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 [2019-01-18 17:39:30,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,084 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 [2019-01-18 17:39:30,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,155 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 [2019-01-18 17:39:30,155 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:30,192 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:30,223 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:30,246 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:30,273 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:30,322 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. [2019-01-18 17:39:30,322 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-18 17:39:30,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,371 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 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-18 17:39:30,372 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:30,581 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. [2019-01-18 17:39:30,582 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 17:39:30,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,670 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 105 [2019-01-18 17:39:30,671 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:31,231 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. [2019-01-18 17:39:31,231 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:57 [2019-01-18 17:39:31,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:31,262 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:31,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:31,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:31,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:39:31,305 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:31,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:39:31,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:39:31,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:39:31,306 INFO L87 Difference]: Start difference. First operand 34 states and 121 transitions. Second operand 8 states. [2019-01-18 17:39:31,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:31,935 INFO L93 Difference]: Finished difference Result 79 states and 193 transitions. [2019-01-18 17:39:31,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:39:31,936 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:39:31,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:31,938 INFO L225 Difference]: With dead ends: 79 [2019-01-18 17:39:31,938 INFO L226 Difference]: Without dead ends: 77 [2019-01-18 17:39:31,939 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:39:31,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-01-18 17:39:31,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 41. [2019-01-18 17:39:31,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-01-18 17:39:31,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 150 transitions. [2019-01-18 17:39:31,949 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 150 transitions. Word has length 4 [2019-01-18 17:39:31,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:31,950 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 150 transitions. [2019-01-18 17:39:31,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:39:31,950 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 150 transitions. [2019-01-18 17:39:31,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:39:31,951 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:31,951 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:39:31,951 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:31,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:31,951 INFO L82 PathProgramCache]: Analyzing trace with hash 941160, now seen corresponding path program 1 times [2019-01-18 17:39:31,952 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:31,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:31,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:31,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:31,953 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:32,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:32,075 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:32,075 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:39:32,075 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [31] [2019-01-18 17:39:32,077 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:32,077 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:32,082 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:32,083 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:39:32,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:32,083 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:32,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:32,083 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:39:32,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:32,094 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:32,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:32,136 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 24 treesize of output 27 [2019-01-18 17:39:32,144 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 27 treesize of output 33 [2019-01-18 17:39:32,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,153 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 29 treesize of output 43 [2019-01-18 17:39:32,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,167 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 31 treesize of output 57 [2019-01-18 17:39:32,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,177 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 33 treesize of output 75 [2019-01-18 17:39:32,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,192 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:39:32,207 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 37 treesize of output 96 [2019-01-18 17:39:32,208 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:32,251 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:32,283 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:32,309 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:32,328 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:32,344 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:32,360 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:32,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,399 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 [2019-01-18 17:39:32,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,440 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 [2019-01-18 17:39:32,755 WARN L181 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2019-01-18 17:39:32,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,766 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 [2019-01-18 17:39:32,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,823 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-01-18 17:39:32,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,896 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 [2019-01-18 17:39:32,897 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:32,922 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:32,947 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:32,973 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:32,998 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:33,047 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. [2019-01-18 17:39:33,048 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-18 17:39:33,379 WARN L181 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2019-01-18 17:39:33,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,386 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 [2019-01-18 17:39:33,388 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:33,429 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. [2019-01-18 17:39:33,430 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 17:39:33,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,463 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:39:33,465 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 [2019-01-18 17:39:33,466 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:33,519 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. [2019-01-18 17:39:33,519 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2019-01-18 17:39:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:33,593 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:33,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:33,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:39:33,639 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:33,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:39:33,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:39:33,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:39:33,640 INFO L87 Difference]: Start difference. First operand 41 states and 150 transitions. Second operand 8 states. [2019-01-18 17:39:34,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:34,084 INFO L93 Difference]: Finished difference Result 74 states and 192 transitions. [2019-01-18 17:39:34,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:39:34,085 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:39:34,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:34,085 INFO L225 Difference]: With dead ends: 74 [2019-01-18 17:39:34,086 INFO L226 Difference]: Without dead ends: 73 [2019-01-18 17:39:34,086 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:39:34,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-01-18 17:39:34,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 41. [2019-01-18 17:39:34,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-01-18 17:39:34,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 150 transitions. [2019-01-18 17:39:34,095 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 150 transitions. Word has length 4 [2019-01-18 17:39:34,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:34,095 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 150 transitions. [2019-01-18 17:39:34,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:39:34,095 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 150 transitions. [2019-01-18 17:39:34,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:39:34,096 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:34,096 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:39:34,096 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:34,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:34,097 INFO L82 PathProgramCache]: Analyzing trace with hash 941656, now seen corresponding path program 1 times [2019-01-18 17:39:34,097 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:34,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:34,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:34,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:34,098 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:34,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:34,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:34,233 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:34,233 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:39:34,233 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [31] [2019-01-18 17:39:34,236 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:34,236 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:34,241 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:34,241 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:39:34,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:34,242 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:34,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:34,242 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:39:34,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:34,251 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:34,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:34,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,295 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 [2019-01-18 17:39:34,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,341 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 [2019-01-18 17:39:34,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,385 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 [2019-01-18 17:39:34,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,446 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 [2019-01-18 17:39:34,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,516 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 [2019-01-18 17:39:34,516 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,546 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,616 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,697 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,722 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,754 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-18 17:39:34,758 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 27 treesize of output 33 [2019-01-18 17:39:34,760 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 29 treesize of output 43 [2019-01-18 17:39:34,764 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 31 treesize of output 57 [2019-01-18 17:39:34,768 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 33 treesize of output 75 [2019-01-18 17:39:34,789 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:39:34,925 INFO L303 Elim1Store]: Index analysis took 133 ms [2019-01-18 17:39:34,926 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 37 treesize of output 96 [2019-01-18 17:39:34,927 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,985 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:35,013 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:35,035 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:35,053 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:35,074 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:35,087 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:35,189 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. [2019-01-18 17:39:35,189 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-18 17:39:35,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,240 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 91 [2019-01-18 17:39:35,241 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:35,300 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. [2019-01-18 17:39:35,300 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 17:39:35,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,464 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:39:35,464 INFO L303 Elim1Store]: Index analysis took 127 ms [2019-01-18 17:39:35,465 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 [2019-01-18 17:39:35,466 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:35,523 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. [2019-01-18 17:39:35,524 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2019-01-18 17:39:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:35,543 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:35,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:35,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:39:35,599 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:35,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:39:35,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:39:35,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:39:35,600 INFO L87 Difference]: Start difference. First operand 41 states and 150 transitions. Second operand 8 states. [2019-01-18 17:39:36,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:36,074 INFO L93 Difference]: Finished difference Result 74 states and 192 transitions. [2019-01-18 17:39:36,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:39:36,075 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:39:36,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:36,076 INFO L225 Difference]: With dead ends: 74 [2019-01-18 17:39:36,076 INFO L226 Difference]: Without dead ends: 72 [2019-01-18 17:39:36,076 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:39:36,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-01-18 17:39:36,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2019-01-18 17:39:36,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-01-18 17:39:36,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 149 transitions. [2019-01-18 17:39:36,085 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 149 transitions. Word has length 4 [2019-01-18 17:39:36,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:36,085 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 149 transitions. [2019-01-18 17:39:36,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:39:36,085 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 149 transitions. [2019-01-18 17:39:36,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:39:36,086 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:36,086 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:39:36,086 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:36,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:36,087 INFO L82 PathProgramCache]: Analyzing trace with hash 941718, now seen corresponding path program 1 times [2019-01-18 17:39:36,087 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:36,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:36,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:36,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:36,088 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:36,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:36,186 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:36,186 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:39:36,186 INFO L207 CegarAbsIntRunner]: [0], [18], [28], [31] [2019-01-18 17:39:36,187 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:36,187 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:36,192 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:36,192 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:39:36,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:36,192 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:36,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:36,193 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:39:36,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:36,206 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:36,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:36,252 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 24 treesize of output 27 [2019-01-18 17:39:36,257 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 27 treesize of output 33 [2019-01-18 17:39:36,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,264 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 29 treesize of output 43 [2019-01-18 17:39:36,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,276 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 31 treesize of output 57 [2019-01-18 17:39:36,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,292 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 33 treesize of output 75 [2019-01-18 17:39:36,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,348 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:39:36,394 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 37 treesize of output 96 [2019-01-18 17:39:36,395 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,440 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,474 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,515 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,562 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,583 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,600 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,642 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 [2019-01-18 17:39:36,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,696 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 [2019-01-18 17:39:36,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,751 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 [2019-01-18 17:39:36,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,845 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 [2019-01-18 17:39:36,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,915 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 [2019-01-18 17:39:36,916 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,941 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,965 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,990 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:37,014 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:37,061 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. [2019-01-18 17:39:37,061 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-18 17:39:37,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:37,109 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 100 [2019-01-18 17:39:37,110 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:39:37,258 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. [2019-01-18 17:39:37,258 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:106, output treesize:150 [2019-01-18 17:39:37,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:37,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:37,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:37,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:37,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:37,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:37,305 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:39:37,306 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 83 treesize of output 97 [2019-01-18 17:39:37,307 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:37,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:37,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:37,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:37,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:37,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:37,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:37,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:37,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:37,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:37,462 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 142 [2019-01-18 17:39:37,476 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 32 xjuncts. [2019-01-18 17:39:38,237 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 2 dim-1 vars, End of recursive call: 36 dim-0 vars, and 7 xjuncts. [2019-01-18 17:39:38,237 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 13 variables, input treesize:172, output treesize:455 [2019-01-18 17:39:49,072 WARN L181 SmtUtils]: Spent 10.69 s on a formula simplification. DAG size of input: 264 DAG size of output: 121 [2019-01-18 17:39:49,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:49,073 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:49,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:49,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 17:39:49,123 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:49,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:39:49,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:39:49,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-18 17:39:49,124 INFO L87 Difference]: Start difference. First operand 40 states and 149 transitions. Second operand 8 states. [2019-01-18 17:39:49,532 WARN L181 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2019-01-18 17:39:55,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:55,003 INFO L93 Difference]: Finished difference Result 79 states and 233 transitions. [2019-01-18 17:39:55,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:39:55,004 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:39:55,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:55,005 INFO L225 Difference]: With dead ends: 79 [2019-01-18 17:39:55,005 INFO L226 Difference]: Without dead ends: 71 [2019-01-18 17:39:55,006 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:39:55,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-01-18 17:39:55,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 41. [2019-01-18 17:39:55,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-01-18 17:39:55,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 177 transitions. [2019-01-18 17:39:55,015 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 177 transitions. Word has length 4 [2019-01-18 17:39:55,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:55,015 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 177 transitions. [2019-01-18 17:39:55,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:39:55,015 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 177 transitions. [2019-01-18 17:39:55,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:39:55,016 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:55,016 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:39:55,017 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:55,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:55,017 INFO L82 PathProgramCache]: Analyzing trace with hash 930312, now seen corresponding path program 1 times [2019-01-18 17:39:55,017 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:55,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:55,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:55,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:55,018 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:55,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:39:55,245 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-18 17:39:55,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-18 17:39:55,245 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 17:39:55,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-18 17:39:55,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-18 17:39:55,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-01-18 17:39:55,246 INFO L87 Difference]: Start difference. First operand 41 states and 177 transitions. Second operand 4 states. [2019-01-18 17:39:55,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:55,527 INFO L93 Difference]: Finished difference Result 53 states and 195 transitions. [2019-01-18 17:39:55,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-18 17:39:55,527 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-18 17:39:55,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:55,528 INFO L225 Difference]: With dead ends: 53 [2019-01-18 17:39:55,528 INFO L226 Difference]: Without dead ends: 52 [2019-01-18 17:39:55,529 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-01-18 17:39:55,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-01-18 17:39:55,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2019-01-18 17:39:55,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-18 17:39:55,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 186 transitions. [2019-01-18 17:39:55,539 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 186 transitions. Word has length 4 [2019-01-18 17:39:55,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:55,539 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 186 transitions. [2019-01-18 17:39:55,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-18 17:39:55,540 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 186 transitions. [2019-01-18 17:39:55,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:39:55,540 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:55,540 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:39:55,541 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:55,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:55,541 INFO L82 PathProgramCache]: Analyzing trace with hash 929876, now seen corresponding path program 1 times [2019-01-18 17:39:55,541 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:55,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:55,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:55,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:55,542 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:55,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:55,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:55,641 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:55,641 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:39:55,641 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [31] [2019-01-18 17:39:55,642 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:55,642 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:55,648 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:55,648 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:39:55,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:55,649 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:55,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:55,649 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:39:55,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:55,667 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:55,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:55,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,724 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 [2019-01-18 17:39:55,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,767 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 [2019-01-18 17:39:55,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,812 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 [2019-01-18 17:39:55,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,875 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 [2019-01-18 17:39:55,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,950 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 [2019-01-18 17:39:55,950 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:55,977 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,003 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,029 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,056 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,092 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-18 17:39:56,095 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 27 treesize of output 33 [2019-01-18 17:39:56,097 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 29 treesize of output 43 [2019-01-18 17:39:56,107 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 31 treesize of output 57 [2019-01-18 17:39:56,110 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-18 17:39:56,113 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:39:56,121 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 37 treesize of output 96 [2019-01-18 17:39:56,122 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,160 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,190 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,213 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,231 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,246 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,260 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,312 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. [2019-01-18 17:39:56,312 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2019-01-18 17:39:56,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,372 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 [2019-01-18 17:39:56,374 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,423 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. [2019-01-18 17:39:56,423 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 17:39:56,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,462 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 [2019-01-18 17:39:56,463 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,509 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. [2019-01-18 17:39:56,510 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2019-01-18 17:39:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:56,526 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:56,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:56,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 17:39:56,557 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:56,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:39:56,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:39:56,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-01-18 17:39:56,558 INFO L87 Difference]: Start difference. First operand 43 states and 186 transitions. Second operand 8 states. [2019-01-18 17:39:57,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:57,030 INFO L93 Difference]: Finished difference Result 87 states and 278 transitions. [2019-01-18 17:39:57,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:39:57,030 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:39:57,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:57,032 INFO L225 Difference]: With dead ends: 87 [2019-01-18 17:39:57,032 INFO L226 Difference]: Without dead ends: 85 [2019-01-18 17:39:57,032 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:39:57,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-01-18 17:39:57,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 41. [2019-01-18 17:39:57,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-01-18 17:39:57,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 149 transitions. [2019-01-18 17:39:57,045 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 149 transitions. Word has length 4 [2019-01-18 17:39:57,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:57,046 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 149 transitions. [2019-01-18 17:39:57,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:39:57,046 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 149 transitions. [2019-01-18 17:39:57,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:39:57,047 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:57,047 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:39:57,047 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:57,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:57,047 INFO L82 PathProgramCache]: Analyzing trace with hash 945688, now seen corresponding path program 1 times [2019-01-18 17:39:57,047 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:57,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:57,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:57,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:57,049 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:57,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:57,074 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:57,074 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:39:57,074 INFO L207 CegarAbsIntRunner]: [0], [22], [32], [33] [2019-01-18 17:39:57,075 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:57,075 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:57,079 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:57,079 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:39:57,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:57,079 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:57,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:57,079 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:39:57,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:57,087 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:57,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:57,128 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 27 [2019-01-18 17:39:57,131 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 27 treesize of output 33 [2019-01-18 17:39:57,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,136 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 29 treesize of output 43 [2019-01-18 17:39:57,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,145 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:39:57,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,157 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 33 treesize of output 75 [2019-01-18 17:39:57,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,219 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:39:57,297 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 37 treesize of output 96 [2019-01-18 17:39:57,299 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,364 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,397 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,422 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,443 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,458 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,474 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,545 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 [2019-01-18 17:39:57,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,580 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 [2019-01-18 17:39:57,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,625 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 [2019-01-18 17:39:57,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,679 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 [2019-01-18 17:39:57,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,747 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 [2019-01-18 17:39:57,748 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,772 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,797 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,823 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,850 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,897 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. [2019-01-18 17:39:57,898 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2019-01-18 17:39:57,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,964 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 [2019-01-18 17:39:57,965 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:58,082 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. [2019-01-18 17:39:58,082 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2019-01-18 17:39:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:58,104 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:58,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:58,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:58,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 17:39:58,166 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:58,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 17:39:58,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 17:39:58,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:39:58,166 INFO L87 Difference]: Start difference. First operand 41 states and 149 transitions. Second operand 6 states. [2019-01-18 17:39:58,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:58,449 INFO L93 Difference]: Finished difference Result 64 states and 185 transitions. [2019-01-18 17:39:58,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 17:39:58,450 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-18 17:39:58,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:58,451 INFO L225 Difference]: With dead ends: 64 [2019-01-18 17:39:58,451 INFO L226 Difference]: Without dead ends: 63 [2019-01-18 17:39:58,452 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 17:39:58,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-01-18 17:39:58,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 42. [2019-01-18 17:39:58,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-01-18 17:39:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 157 transitions. [2019-01-18 17:39:58,462 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 157 transitions. Word has length 4 [2019-01-18 17:39:58,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:58,463 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 157 transitions. [2019-01-18 17:39:58,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 17:39:58,463 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 157 transitions. [2019-01-18 17:39:58,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:39:58,464 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:58,464 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:39:58,464 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:58,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:58,464 INFO L82 PathProgramCache]: Analyzing trace with hash 945004, now seen corresponding path program 1 times [2019-01-18 17:39:58,464 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:58,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:58,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:58,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:58,466 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:58,879 WARN L181 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2019-01-18 17:39:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:58,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:58,896 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:58,896 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:39:58,897 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [31] [2019-01-18 17:39:58,898 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:58,898 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:58,902 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:58,902 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:39:58,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:58,903 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:58,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:58,903 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:39:58,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:58,915 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:58,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:58,958 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 24 treesize of output 27 [2019-01-18 17:39:58,961 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 27 treesize of output 33 [2019-01-18 17:39:58,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,969 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-18 17:39:58,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,979 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 31 treesize of output 57 [2019-01-18 17:39:58,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,992 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 33 treesize of output 75 [2019-01-18 17:39:59,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,008 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:39:59,018 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 37 treesize of output 96 [2019-01-18 17:39:59,019 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,067 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,099 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,124 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,143 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,159 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,174 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,211 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-01-18 17:39:59,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,249 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 [2019-01-18 17:39:59,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,292 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 [2019-01-18 17:39:59,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,368 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 [2019-01-18 17:39:59,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,437 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 [2019-01-18 17:39:59,438 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,462 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,493 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,518 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,544 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,592 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. [2019-01-18 17:39:59,592 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-18 17:39:59,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,670 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-18 17:39:59,670 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,715 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. [2019-01-18 17:39:59,715 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 17:39:59,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,754 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 [2019-01-18 17:39:59,755 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,803 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. [2019-01-18 17:39:59,803 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2019-01-18 17:39:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:59,825 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:59,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:59,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 17:39:59,860 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:59,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:39:59,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:39:59,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-01-18 17:39:59,861 INFO L87 Difference]: Start difference. First operand 42 states and 157 transitions. Second operand 8 states. [2019-01-18 17:40:00,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:00,769 INFO L93 Difference]: Finished difference Result 98 states and 268 transitions. [2019-01-18 17:40:00,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:40:00,769 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:40:00,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:00,770 INFO L225 Difference]: With dead ends: 98 [2019-01-18 17:40:00,770 INFO L226 Difference]: Without dead ends: 97 [2019-01-18 17:40:00,770 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-01-18 17:40:00,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-01-18 17:40:00,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 47. [2019-01-18 17:40:00,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-01-18 17:40:00,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 197 transitions. [2019-01-18 17:40:00,789 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 197 transitions. Word has length 4 [2019-01-18 17:40:00,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:00,790 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 197 transitions. [2019-01-18 17:40:00,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:40:00,791 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 197 transitions. [2019-01-18 17:40:00,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:40:00,792 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:00,792 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:40:00,792 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:00,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:00,794 INFO L82 PathProgramCache]: Analyzing trace with hash 945500, now seen corresponding path program 1 times [2019-01-18 17:40:00,794 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:00,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:00,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:00,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:00,796 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:00,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:00,940 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:00,940 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:40:00,940 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [31] [2019-01-18 17:40:00,941 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:00,942 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:00,947 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:00,947 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:40:00,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:00,947 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:00,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:00,948 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:00,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:00,961 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:00,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:00,998 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 24 treesize of output 27 [2019-01-18 17:40:01,004 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 27 treesize of output 33 [2019-01-18 17:40:01,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,012 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 29 treesize of output 43 [2019-01-18 17:40:01,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,020 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:40:01,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,029 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 33 treesize of output 75 [2019-01-18 17:40:01,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,040 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:40:01,178 INFO L303 Elim1Store]: Index analysis took 135 ms [2019-01-18 17:40:01,178 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 37 treesize of output 96 [2019-01-18 17:40:01,179 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,333 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,366 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,390 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,410 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,424 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,440 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,476 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 [2019-01-18 17:40:01,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,515 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-01-18 17:40:01,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,563 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-01-18 17:40:01,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,624 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 [2019-01-18 17:40:01,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,703 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 [2019-01-18 17:40:01,704 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,730 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,755 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,781 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,807 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,853 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. [2019-01-18 17:40:01,854 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-18 17:40:01,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,895 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 [2019-01-18 17:40:01,895 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,938 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. [2019-01-18 17:40:01,939 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 17:40:01,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:02,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:02,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:02,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:02,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:02,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:02,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:02,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:02,110 INFO L303 Elim1Store]: Index analysis took 148 ms [2019-01-18 17:40:02,111 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 41 treesize of output 111 [2019-01-18 17:40:02,112 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:02,362 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. [2019-01-18 17:40:02,362 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2019-01-18 17:40:02,574 WARN L181 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2019-01-18 17:40:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:02,575 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:03,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:03,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:40:03,045 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:03,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:40:03,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:40:03,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:40:03,046 INFO L87 Difference]: Start difference. First operand 47 states and 197 transitions. Second operand 8 states. [2019-01-18 17:40:03,700 WARN L181 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2019-01-18 17:40:04,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:04,603 INFO L93 Difference]: Finished difference Result 91 states and 282 transitions. [2019-01-18 17:40:04,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:40:04,603 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:40:04,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:04,605 INFO L225 Difference]: With dead ends: 91 [2019-01-18 17:40:04,605 INFO L226 Difference]: Without dead ends: 89 [2019-01-18 17:40:04,606 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:40:04,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-01-18 17:40:04,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 56. [2019-01-18 17:40:04,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-01-18 17:40:04,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 243 transitions. [2019-01-18 17:40:04,620 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 243 transitions. Word has length 4 [2019-01-18 17:40:04,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:04,620 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 243 transitions. [2019-01-18 17:40:04,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:40:04,620 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 243 transitions. [2019-01-18 17:40:04,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:40:04,621 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:04,621 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:40:04,621 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:04,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:04,622 INFO L82 PathProgramCache]: Analyzing trace with hash 933968, now seen corresponding path program 1 times [2019-01-18 17:40:04,622 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:04,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:04,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:04,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:04,627 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:04,797 WARN L181 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-01-18 17:40:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:04,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:04,811 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:04,811 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:40:04,811 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [31] [2019-01-18 17:40:04,812 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:04,812 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:04,815 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:04,815 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:40:04,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:04,816 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:04,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:04,816 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:04,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:04,827 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:04,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:04,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:04,857 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 [2019-01-18 17:40:04,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:04,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:04,903 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 [2019-01-18 17:40:04,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:04,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:04,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:04,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:04,950 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-01-18 17:40:05,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:05,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:05,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:05,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:05,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:05,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:05,007 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-18 17:40:05,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:05,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:05,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:05,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:05,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:05,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:05,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:05,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:05,078 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 [2019-01-18 17:40:05,079 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:05,106 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:05,131 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:05,158 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:05,185 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:05,220 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 24 treesize of output 27 [2019-01-18 17:40:05,224 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 27 treesize of output 33 [2019-01-18 17:40:05,228 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 29 treesize of output 43 [2019-01-18 17:40:05,231 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 31 treesize of output 57 [2019-01-18 17:40:05,249 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 33 treesize of output 75 [2019-01-18 17:40:05,266 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:40:05,273 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-18 17:40:05,273 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:05,312 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:05,341 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:05,364 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:05,383 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:05,398 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:05,412 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:05,460 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. [2019-01-18 17:40:05,460 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-18 17:40:05,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:05,545 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 [2019-01-18 17:40:05,546 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:05,589 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. [2019-01-18 17:40:05,590 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 17:40:05,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:05,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:05,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:05,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:05,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:05,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:05,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:05,618 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:05,619 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 [2019-01-18 17:40:05,620 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:05,672 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. [2019-01-18 17:40:05,673 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:61 [2019-01-18 17:40:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:05,690 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:05,732 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:05,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:40:05,732 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:05,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:40:05,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:40:05,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:40:05,733 INFO L87 Difference]: Start difference. First operand 56 states and 243 transitions. Second operand 8 states. [2019-01-18 17:40:06,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:06,146 INFO L93 Difference]: Finished difference Result 92 states and 291 transitions. [2019-01-18 17:40:06,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:40:06,147 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:40:06,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:06,148 INFO L225 Difference]: With dead ends: 92 [2019-01-18 17:40:06,148 INFO L226 Difference]: Without dead ends: 90 [2019-01-18 17:40:06,149 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 [2019-01-18 17:40:06,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-01-18 17:40:06,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 59. [2019-01-18 17:40:06,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-01-18 17:40:06,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 254 transitions. [2019-01-18 17:40:06,162 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 254 transitions. Word has length 4 [2019-01-18 17:40:06,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:06,163 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 254 transitions. [2019-01-18 17:40:06,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:40:06,163 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 254 transitions. [2019-01-18 17:40:06,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:40:06,164 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:06,164 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:40:06,164 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:06,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:06,164 INFO L82 PathProgramCache]: Analyzing trace with hash 949406, now seen corresponding path program 1 times [2019-01-18 17:40:06,165 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:06,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:06,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:06,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:06,166 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:06,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:06,284 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:06,284 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:40:06,284 INFO L207 CegarAbsIntRunner]: [0], [26], [28], [31] [2019-01-18 17:40:06,287 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:06,287 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:06,294 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:06,294 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:40:06,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:06,295 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:06,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:06,295 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:06,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:06,306 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:06,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:06,370 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 24 treesize of output 27 [2019-01-18 17:40:06,377 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 27 treesize of output 33 [2019-01-18 17:40:06,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,389 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 29 treesize of output 43 [2019-01-18 17:40:06,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,398 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 31 treesize of output 57 [2019-01-18 17:40:06,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,410 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 33 treesize of output 75 [2019-01-18 17:40:06,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,426 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:40:06,441 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 37 treesize of output 96 [2019-01-18 17:40:06,442 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,480 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,511 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,535 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,573 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,588 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,604 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,639 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 [2019-01-18 17:40:06,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,677 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 [2019-01-18 17:40:06,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,722 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 [2019-01-18 17:40:06,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,775 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 [2019-01-18 17:40:06,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,846 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 [2019-01-18 17:40:06,846 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,871 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,896 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,922 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,948 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,997 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. [2019-01-18 17:40:06,997 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-18 17:40:07,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,085 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 106 [2019-01-18 17:40:07,086 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:40:07,248 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. [2019-01-18 17:40:07,249 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:106, output treesize:150 [2019-01-18 17:40:07,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,372 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 142 [2019-01-18 17:40:07,380 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 32 xjuncts. [2019-01-18 17:40:08,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:08,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:08,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:08,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:08,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:08,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:08,236 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:08,237 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 83 treesize of output 97 [2019-01-18 17:40:08,238 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:08,490 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 2 dim-1 vars, End of recursive call: 36 dim-0 vars, and 7 xjuncts. [2019-01-18 17:40:08,491 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 13 variables, input treesize:172, output treesize:455 [2019-01-18 17:40:21,229 WARN L181 SmtUtils]: Spent 12.54 s on a formula simplification. DAG size of input: 264 DAG size of output: 121 [2019-01-18 17:40:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:21,230 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:21,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:21,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:21,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 17:40:21,274 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:21,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:40:21,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:40:21,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-18 17:40:21,275 INFO L87 Difference]: Start difference. First operand 59 states and 254 transitions. Second operand 8 states. [2019-01-18 17:40:31,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:31,211 INFO L93 Difference]: Finished difference Result 101 states and 344 transitions. [2019-01-18 17:40:31,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:40:31,212 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:40:31,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:31,214 INFO L225 Difference]: With dead ends: 101 [2019-01-18 17:40:31,214 INFO L226 Difference]: Without dead ends: 100 [2019-01-18 17:40:31,215 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:40:31,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-01-18 17:40:31,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 63. [2019-01-18 17:40:31,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-01-18 17:40:31,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 286 transitions. [2019-01-18 17:40:31,231 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 286 transitions. Word has length 4 [2019-01-18 17:40:31,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:31,232 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 286 transitions. [2019-01-18 17:40:31,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:40:31,232 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 286 transitions. [2019-01-18 17:40:31,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:40:31,233 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:31,233 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:40:31,233 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:31,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:31,233 INFO L82 PathProgramCache]: Analyzing trace with hash 951454, now seen corresponding path program 1 times [2019-01-18 17:40:31,233 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:31,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:31,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:31,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:31,235 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:31,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:31,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:31,277 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:31,277 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:40:31,278 INFO L207 CegarAbsIntRunner]: [0], [28], [32], [33] [2019-01-18 17:40:31,278 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:31,279 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:31,283 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:31,283 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:40:31,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:31,284 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:31,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:31,284 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:31,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:31,297 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:31,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:31,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,346 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 91 treesize of output 91 [2019-01-18 17:40:31,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,394 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 78 treesize of output 84 [2019-01-18 17:40:31,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,449 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 63 treesize of output 86 [2019-01-18 17:40:31,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,520 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 51 treesize of output 91 [2019-01-18 17:40:31,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,605 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 17:40:31,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,709 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 17:40:31,710 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:31,757 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:31,801 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:31,855 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:31,910 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:31,960 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:32,018 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 27 [2019-01-18 17:40:32,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-18 17:40:32,025 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-18 17:40:32,028 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:40:32,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-18 17:40:32,038 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:40:32,041 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 37 treesize of output 120 [2019-01-18 17:40:32,042 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:32,091 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:32,121 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:32,144 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:32,162 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:32,178 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:32,192 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:32,259 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. [2019-01-18 17:40:32,260 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 7 variables, input treesize:118, output treesize:120 [2019-01-18 17:40:32,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,284 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-18 17:40:32,285 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:32,357 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:32,358 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-18 17:40:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:32,412 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:32,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:32,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 17:40:32,441 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:32,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 17:40:32,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 17:40:32,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:40:32,442 INFO L87 Difference]: Start difference. First operand 63 states and 286 transitions. Second operand 6 states. [2019-01-18 17:40:32,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:32,693 INFO L93 Difference]: Finished difference Result 86 states and 322 transitions. [2019-01-18 17:40:32,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 17:40:32,694 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-18 17:40:32,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:32,694 INFO L225 Difference]: With dead ends: 86 [2019-01-18 17:40:32,694 INFO L226 Difference]: Without dead ends: 85 [2019-01-18 17:40:32,695 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 17:40:32,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-01-18 17:40:32,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 64. [2019-01-18 17:40:32,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-01-18 17:40:32,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 294 transitions. [2019-01-18 17:40:32,708 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 294 transitions. Word has length 4 [2019-01-18 17:40:32,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:32,709 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 294 transitions. [2019-01-18 17:40:32,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 17:40:32,709 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 294 transitions. [2019-01-18 17:40:32,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:40:32,710 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:32,710 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:40:32,710 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:32,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:32,710 INFO L82 PathProgramCache]: Analyzing trace with hash 951266, now seen corresponding path program 2 times [2019-01-18 17:40:32,710 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:32,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:32,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:32,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:32,711 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:32,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:32,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:32,794 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:32,794 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 17:40:32,795 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 17:40:32,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:32,795 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:32,806 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 17:40:32,807 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 17:40:32,824 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-01-18 17:40:32,825 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 17:40:32,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:32,910 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 24 treesize of output 27 [2019-01-18 17:40:32,914 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 27 treesize of output 33 [2019-01-18 17:40:32,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,920 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-18 17:40:32,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,929 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 31 treesize of output 57 [2019-01-18 17:40:32,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,969 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 33 treesize of output 75 [2019-01-18 17:40:32,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,978 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:40:33,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,008 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 37 treesize of output 120 [2019-01-18 17:40:33,009 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:33,066 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:33,101 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:33,126 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:33,148 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:33,165 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:33,180 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:33,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,220 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 17:40:33,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,274 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 78 treesize of output 84 [2019-01-18 17:40:33,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,327 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 63 treesize of output 86 [2019-01-18 17:40:33,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,389 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 51 treesize of output 91 [2019-01-18 17:40:33,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,517 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 17:40:33,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,620 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 17:40:33,621 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:33,778 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:33,814 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:33,854 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:33,894 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:33,935 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:34,014 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. [2019-01-18 17:40:34,015 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 6 variables, input treesize:118, output treesize:120 [2019-01-18 17:40:34,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,043 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-18 17:40:34,043 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:34,123 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. [2019-01-18 17:40:34,124 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-18 17:40:34,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,161 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-18 17:40:34,161 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:34,229 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:34,229 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-18 17:40:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:34,251 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:34,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:34,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 17:40:34,286 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:34,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:40:34,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:40:34,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-18 17:40:34,286 INFO L87 Difference]: Start difference. First operand 64 states and 294 transitions. Second operand 8 states. [2019-01-18 17:40:34,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:34,900 INFO L93 Difference]: Finished difference Result 119 states and 384 transitions. [2019-01-18 17:40:34,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:40:34,900 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:40:34,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:34,902 INFO L225 Difference]: With dead ends: 119 [2019-01-18 17:40:34,902 INFO L226 Difference]: Without dead ends: 115 [2019-01-18 17:40:34,903 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:40:34,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-01-18 17:40:34,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 67. [2019-01-18 17:40:34,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-01-18 17:40:34,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 286 transitions. [2019-01-18 17:40:34,918 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 286 transitions. Word has length 4 [2019-01-18 17:40:34,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:34,918 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 286 transitions. [2019-01-18 17:40:34,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:40:34,919 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 286 transitions. [2019-01-18 17:40:34,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:40:34,919 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:34,919 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:40:34,919 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:34,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:34,920 INFO L82 PathProgramCache]: Analyzing trace with hash 938000, now seen corresponding path program 1 times [2019-01-18 17:40:34,920 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:34,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:34,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 17:40:34,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:34,921 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:35,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:35,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:35,040 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:35,040 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:40:35,040 INFO L207 CegarAbsIntRunner]: [0], [14], [32], [33] [2019-01-18 17:40:35,041 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:35,041 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:35,044 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:35,044 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:40:35,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:35,044 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:35,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:35,045 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:35,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:35,054 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:35,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:35,090 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 27 [2019-01-18 17:40:35,107 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-18 17:40:35,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,117 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 29 treesize of output 43 [2019-01-18 17:40:35,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,124 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 31 treesize of output 57 [2019-01-18 17:40:35,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,135 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 33 treesize of output 75 [2019-01-18 17:40:35,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,145 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:40:35,158 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-18 17:40:35,159 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,197 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,229 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,255 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,275 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,291 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,307 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,341 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 [2019-01-18 17:40:35,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-01-18 17:40:35,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,426 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 [2019-01-18 17:40:35,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,482 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 [2019-01-18 17:40:35,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,552 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 [2019-01-18 17:40:35,553 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,579 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,604 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,630 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,656 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,702 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. [2019-01-18 17:40:35,702 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2019-01-18 17:40:35,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,738 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 [2019-01-18 17:40:35,739 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,782 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. [2019-01-18 17:40:35,782 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2019-01-18 17:40:35,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:35,821 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:35,849 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:35,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 17:40:35,850 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:35,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 17:40:35,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 17:40:35,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:40:35,850 INFO L87 Difference]: Start difference. First operand 67 states and 286 transitions. Second operand 6 states. [2019-01-18 17:40:36,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:36,715 INFO L93 Difference]: Finished difference Result 90 states and 322 transitions. [2019-01-18 17:40:36,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 17:40:36,717 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-18 17:40:36,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:36,719 INFO L225 Difference]: With dead ends: 90 [2019-01-18 17:40:36,719 INFO L226 Difference]: Without dead ends: 89 [2019-01-18 17:40:36,719 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 [2019-01-18 17:40:36,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-01-18 17:40:36,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 68. [2019-01-18 17:40:36,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-01-18 17:40:36,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 294 transitions. [2019-01-18 17:40:36,737 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 294 transitions. Word has length 4 [2019-01-18 17:40:36,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:36,737 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 294 transitions. [2019-01-18 17:40:36,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 17:40:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 294 transitions. [2019-01-18 17:40:36,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:40:36,738 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:36,738 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:40:36,739 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:36,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:36,739 INFO L82 PathProgramCache]: Analyzing trace with hash 29197230, now seen corresponding path program 1 times [2019-01-18 17:40:36,739 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:36,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:36,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:36,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:36,740 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:36,914 WARN L181 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2019-01-18 17:40:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:36,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:36,971 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:36,971 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:40:36,971 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [34], [35] [2019-01-18 17:40:36,972 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:36,972 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:36,976 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:36,976 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:40:36,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:36,976 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:36,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:36,977 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:36,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:36,992 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:36,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:37,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,019 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 57 treesize of output 63 [2019-01-18 17:40:37,025 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 59 treesize of output 48 [2019-01-18 17:40:37,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,050 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 41 treesize of output 62 [2019-01-18 17:40:37,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,098 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 72 [2019-01-18 17:40:37,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,166 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 53 [2019-01-18 17:40:37,166 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,189 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,211 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,235 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,259 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,533 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 24 treesize of output 27 [2019-01-18 17:40:37,537 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 27 treesize of output 33 [2019-01-18 17:40:37,544 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2019-01-18 17:40:37,550 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 49 [2019-01-18 17:40:37,557 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2019-01-18 17:40:37,562 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 89 [2019-01-18 17:40:37,573 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 88 [2019-01-18 17:40:37,574 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,606 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,631 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,650 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,666 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,681 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,694 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,735 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. [2019-01-18 17:40:37,735 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:84, output treesize:88 [2019-01-18 17:40:37,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,774 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 0 case distinctions, treesize of input 41 treesize of output 83 [2019-01-18 17:40:37,775 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,810 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. [2019-01-18 17:40:37,811 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:93, output treesize:63 [2019-01-18 17:40:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:37,833 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:37,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:37,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 6 [2019-01-18 17:40:37,860 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:37,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-01-18 17:40:37,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-01-18 17:40:37,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:40:37,861 INFO L87 Difference]: Start difference. First operand 68 states and 294 transitions. Second operand 7 states. [2019-01-18 17:40:38,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:38,158 INFO L93 Difference]: Finished difference Result 77 states and 308 transitions. [2019-01-18 17:40:38,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 17:40:38,160 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 5 [2019-01-18 17:40:38,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:38,161 INFO L225 Difference]: With dead ends: 77 [2019-01-18 17:40:38,162 INFO L226 Difference]: Without dead ends: 76 [2019-01-18 17:40:38,162 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-01-18 17:40:38,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-01-18 17:40:38,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2019-01-18 17:40:38,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-01-18 17:40:38,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 301 transitions. [2019-01-18 17:40:38,179 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 301 transitions. Word has length 5 [2019-01-18 17:40:38,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:38,180 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 301 transitions. [2019-01-18 17:40:38,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-01-18 17:40:38,180 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 301 transitions. [2019-01-18 17:40:38,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:40:38,180 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:38,180 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:40:38,180 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:38,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:38,181 INFO L82 PathProgramCache]: Analyzing trace with hash 29172180, now seen corresponding path program 1 times [2019-01-18 17:40:38,181 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:38,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:38,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:38,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:38,182 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:38,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:40:38,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:38,377 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:38,377 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:40:38,377 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [32], [33] [2019-01-18 17:40:38,378 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:38,378 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:38,381 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:38,381 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:40:38,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:38,381 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:38,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:38,382 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:38,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:38,390 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:38,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:38,511 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 24 treesize of output 27 [2019-01-18 17:40:38,514 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 27 treesize of output 33 [2019-01-18 17:40:38,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,520 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 29 treesize of output 43 [2019-01-18 17:40:38,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,527 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 31 treesize of output 57 [2019-01-18 17:40:38,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,535 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 33 treesize of output 75 [2019-01-18 17:40:38,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,545 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:40:38,555 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 37 treesize of output 96 [2019-01-18 17:40:38,556 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:38,596 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:38,628 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:38,654 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:38,673 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:38,689 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:38,705 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:38,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,743 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 [2019-01-18 17:40:38,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,783 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 [2019-01-18 17:40:38,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,826 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 [2019-01-18 17:40:38,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,884 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 [2019-01-18 17:40:38,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:38,953 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 [2019-01-18 17:40:38,954 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:38,980 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:39,005 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:39,031 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:39,057 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:39,105 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. [2019-01-18 17:40:39,106 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-18 17:40:39,358 WARN L181 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2019-01-18 17:40:39,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,364 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-18 17:40:39,365 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:39,405 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. [2019-01-18 17:40:39,405 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 17:40:39,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,468 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 [2019-01-18 17:40:39,468 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:39,520 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. [2019-01-18 17:40:39,521 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:57 [2019-01-18 17:40:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:39,546 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:39,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:39,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:40:39,586 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:39,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:40:39,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:40:39,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:40:39,587 INFO L87 Difference]: Start difference. First operand 69 states and 301 transitions. Second operand 8 states. [2019-01-18 17:40:40,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:40,040 INFO L93 Difference]: Finished difference Result 102 states and 353 transitions. [2019-01-18 17:40:40,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:40:40,041 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 17:40:40,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:40,042 INFO L225 Difference]: With dead ends: 102 [2019-01-18 17:40:40,042 INFO L226 Difference]: Without dead ends: 101 [2019-01-18 17:40:40,043 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:40:40,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-01-18 17:40:40,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 71. [2019-01-18 17:40:40,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-01-18 17:40:40,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 317 transitions. [2019-01-18 17:40:40,067 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 317 transitions. Word has length 5 [2019-01-18 17:40:40,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:40,067 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 317 transitions. [2019-01-18 17:40:40,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:40:40,067 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 317 transitions. [2019-01-18 17:40:40,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:40:40,068 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:40,068 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:40:40,068 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:40,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:40,069 INFO L82 PathProgramCache]: Analyzing trace with hash 29171496, now seen corresponding path program 1 times [2019-01-18 17:40:40,069 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:40,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:40,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:40,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:40,070 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:40,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:40,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:40,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:40,228 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:40,228 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:40:40,228 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [31] [2019-01-18 17:40:40,229 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:40,230 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:40,232 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:40,233 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:40:40,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:40,233 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:40,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:40,233 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:40,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:40,246 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:40,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:40,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:40,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,275 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 [2019-01-18 17:40:40,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,310 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 [2019-01-18 17:40:40,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,358 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-01-18 17:40:40,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,417 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-01-18 17:40:40,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,489 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 [2019-01-18 17:40:40,490 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:40,515 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:40,542 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:40,568 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:40,593 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:40,626 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-18 17:40:40,629 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 27 treesize of output 33 [2019-01-18 17:40:40,632 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 29 treesize of output 43 [2019-01-18 17:40:40,634 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:40:40,637 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 33 treesize of output 75 [2019-01-18 17:40:40,640 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:40:40,657 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 37 treesize of output 96 [2019-01-18 17:40:40,658 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:40,693 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:40,749 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:40,772 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:40,790 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:40,806 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:40,820 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:40,867 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. [2019-01-18 17:40:40,868 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-18 17:40:40,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,912 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 [2019-01-18 17:40:40,913 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:40,954 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. [2019-01-18 17:40:40,955 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 17:40:40,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,989 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 [2019-01-18 17:40:40,990 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:41,036 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. [2019-01-18 17:40:41,037 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-18 17:40:41,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,072 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:41,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,074 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-18 17:40:41,075 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:41,125 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. [2019-01-18 17:40:41,126 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-18 17:40:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:41,145 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:41,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:41,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:41,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 17:40:41,191 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:41,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:40:41,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:40:41,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:40:41,192 INFO L87 Difference]: Start difference. First operand 71 states and 317 transitions. Second operand 10 states. [2019-01-18 17:40:43,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:43,051 INFO L93 Difference]: Finished difference Result 147 states and 540 transitions. [2019-01-18 17:40:43,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-18 17:40:43,051 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:40:43,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:43,054 INFO L225 Difference]: With dead ends: 147 [2019-01-18 17:40:43,054 INFO L226 Difference]: Without dead ends: 146 [2019-01-18 17:40:43,054 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:40:43,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-01-18 17:40:43,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 89. [2019-01-18 17:40:43,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-01-18 17:40:43,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 464 transitions. [2019-01-18 17:40:43,091 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 464 transitions. Word has length 5 [2019-01-18 17:40:43,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:43,092 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 464 transitions. [2019-01-18 17:40:43,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:40:43,092 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 464 transitions. [2019-01-18 17:40:43,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:40:43,092 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:43,092 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:40:43,093 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:43,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:43,093 INFO L82 PathProgramCache]: Analyzing trace with hash 29187556, now seen corresponding path program 1 times [2019-01-18 17:40:43,093 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:43,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:43,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:43,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:43,094 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:43,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:43,144 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:43,144 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:40:43,144 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [32], [33] [2019-01-18 17:40:43,145 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:43,145 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:43,148 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:43,149 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:40:43,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:43,149 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:43,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:43,149 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:43,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:43,158 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:43,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:43,188 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 24 treesize of output 27 [2019-01-18 17:40:43,190 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 27 treesize of output 33 [2019-01-18 17:40:43,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,197 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 29 treesize of output 43 [2019-01-18 17:40:43,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,204 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 31 treesize of output 57 [2019-01-18 17:40:43,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,216 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 33 treesize of output 75 [2019-01-18 17:40:43,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,229 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:40:43,239 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 37 treesize of output 96 [2019-01-18 17:40:43,240 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,282 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,315 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,341 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,359 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,377 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,393 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,428 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-01-18 17:40:43,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,467 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 [2019-01-18 17:40:43,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,512 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 [2019-01-18 17:40:43,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,569 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 [2019-01-18 17:40:43,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,640 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 [2019-01-18 17:40:43,641 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,667 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,693 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,719 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,745 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,793 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. [2019-01-18 17:40:43,793 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-18 17:40:43,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,832 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 [2019-01-18 17:40:43,832 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,874 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. [2019-01-18 17:40:43,875 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 17:40:43,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,965 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 [2019-01-18 17:40:43,966 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:44,011 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. [2019-01-18 17:40:44,012 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:57 [2019-01-18 17:40:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:44,035 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:44,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:44,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:40:44,075 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:44,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:40:44,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:40:44,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:40:44,075 INFO L87 Difference]: Start difference. First operand 89 states and 464 transitions. Second operand 8 states. [2019-01-18 17:40:44,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:44,480 INFO L93 Difference]: Finished difference Result 128 states and 531 transitions. [2019-01-18 17:40:44,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:40:44,480 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 17:40:44,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:44,482 INFO L225 Difference]: With dead ends: 128 [2019-01-18 17:40:44,482 INFO L226 Difference]: Without dead ends: 127 [2019-01-18 17:40:44,483 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:40:44,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-01-18 17:40:44,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2019-01-18 17:40:44,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-01-18 17:40:44,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 488 transitions. [2019-01-18 17:40:44,520 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 488 transitions. Word has length 5 [2019-01-18 17:40:44,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:44,520 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 488 transitions. [2019-01-18 17:40:44,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:40:44,521 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 488 transitions. [2019-01-18 17:40:44,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:40:44,521 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:44,521 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:40:44,522 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:44,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:44,522 INFO L82 PathProgramCache]: Analyzing trace with hash 29187368, now seen corresponding path program 1 times [2019-01-18 17:40:44,522 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:44,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:44,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:44,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:44,523 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:44,665 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-01-18 17:40:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:44,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:44,702 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:44,702 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:40:44,702 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [26], [31] [2019-01-18 17:40:44,703 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:44,703 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:44,706 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:44,706 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:40:44,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:44,707 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:44,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:44,707 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:44,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:44,718 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:44,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:44,746 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 27 [2019-01-18 17:40:44,749 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 27 treesize of output 33 [2019-01-18 17:40:44,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,755 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 29 treesize of output 43 [2019-01-18 17:40:44,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,763 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 31 treesize of output 57 [2019-01-18 17:40:44,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,773 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 33 treesize of output 75 [2019-01-18 17:40:44,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,787 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:40:44,802 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 37 treesize of output 96 [2019-01-18 17:40:44,802 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:44,845 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:44,876 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:44,902 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:44,923 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:44,939 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:44,956 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:44,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,995 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 68 treesize of output 71 [2019-01-18 17:40:45,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,043 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 [2019-01-18 17:40:45,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,089 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 [2019-01-18 17:40:45,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,143 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 [2019-01-18 17:40:45,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,214 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-18 17:40:45,215 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:45,239 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:45,264 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:45,290 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:45,317 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:45,365 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. [2019-01-18 17:40:45,366 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-18 17:40:45,482 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2019-01-18 17:40:45,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,527 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 [2019-01-18 17:40:45,528 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:45,591 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. [2019-01-18 17:40:45,591 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 17:40:45,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,630 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 [2019-01-18 17:40:45,632 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:45,676 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. [2019-01-18 17:40:45,676 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-18 17:40:45,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,711 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:45,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,713 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 [2019-01-18 17:40:45,714 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:45,761 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. [2019-01-18 17:40:45,761 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-18 17:40:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:45,783 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:45,855 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:45,856 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:40:45,856 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:45,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:40:45,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:40:45,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:40:45,856 INFO L87 Difference]: Start difference. First operand 92 states and 488 transitions. Second operand 10 states. [2019-01-18 17:40:46,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:46,568 INFO L93 Difference]: Finished difference Result 146 states and 591 transitions. [2019-01-18 17:40:46,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:40:46,569 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:40:46,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:46,571 INFO L225 Difference]: With dead ends: 146 [2019-01-18 17:40:46,571 INFO L226 Difference]: Without dead ends: 144 [2019-01-18 17:40:46,572 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:40:46,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-01-18 17:40:46,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 98. [2019-01-18 17:40:46,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-01-18 17:40:46,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 536 transitions. [2019-01-18 17:40:46,610 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 536 transitions. Word has length 5 [2019-01-18 17:40:46,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:46,611 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 536 transitions. [2019-01-18 17:40:46,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:40:46,611 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 536 transitions. [2019-01-18 17:40:46,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:40:46,611 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:46,612 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:40:46,612 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:46,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:46,612 INFO L82 PathProgramCache]: Analyzing trace with hash 29175836, now seen corresponding path program 1 times [2019-01-18 17:40:46,612 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:46,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:46,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:46,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:46,613 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:46,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:46,785 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:46,785 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:40:46,785 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [26], [31] [2019-01-18 17:40:46,786 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:46,786 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:46,789 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:46,789 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:40:46,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:46,790 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:46,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:46,790 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:46,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:46,800 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:46,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:46,829 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 24 treesize of output 27 [2019-01-18 17:40:46,833 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 27 treesize of output 33 [2019-01-18 17:40:46,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,838 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 29 treesize of output 43 [2019-01-18 17:40:46,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:40:46,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,855 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 33 treesize of output 75 [2019-01-18 17:40:46,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,865 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:40:46,875 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 37 treesize of output 96 [2019-01-18 17:40:46,876 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:46,918 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:46,952 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:46,979 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:47,000 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:47,016 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:47,032 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:47,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,068 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 [2019-01-18 17:40:47,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,106 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 [2019-01-18 17:40:47,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,153 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 [2019-01-18 17:40:47,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,211 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-01-18 17:40:47,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,292 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 [2019-01-18 17:40:47,292 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:47,319 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:47,345 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:47,371 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:47,397 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:47,446 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. [2019-01-18 17:40:47,447 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-18 17:40:47,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,512 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 [2019-01-18 17:40:47,513 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:47,554 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. [2019-01-18 17:40:47,554 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 17:40:47,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,585 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:47,586 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 [2019-01-18 17:40:47,587 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:47,636 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. [2019-01-18 17:40:47,636 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:59 [2019-01-18 17:40:47,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,673 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:47,674 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 [2019-01-18 17:40:47,675 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:47,720 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. [2019-01-18 17:40:47,720 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:57 [2019-01-18 17:40:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:47,743 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:47,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:47,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:40:47,824 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:47,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:40:47,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:40:47,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:40:47,824 INFO L87 Difference]: Start difference. First operand 98 states and 536 transitions. Second operand 10 states. [2019-01-18 17:40:48,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:48,792 INFO L93 Difference]: Finished difference Result 140 states and 582 transitions. [2019-01-18 17:40:48,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:40:48,793 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:40:48,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:48,794 INFO L225 Difference]: With dead ends: 140 [2019-01-18 17:40:48,795 INFO L226 Difference]: Without dead ends: 138 [2019-01-18 17:40:48,795 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2019-01-18 17:40:48,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-01-18 17:40:48,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 92. [2019-01-18 17:40:48,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-01-18 17:40:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 486 transitions. [2019-01-18 17:40:48,833 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 486 transitions. Word has length 5 [2019-01-18 17:40:48,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:48,833 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 486 transitions. [2019-01-18 17:40:48,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:40:48,833 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 486 transitions. [2019-01-18 17:40:48,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:40:48,834 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:48,834 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:40:48,834 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:48,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:48,834 INFO L82 PathProgramCache]: Analyzing trace with hash 29191274, now seen corresponding path program 1 times [2019-01-18 17:40:48,834 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:48,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:48,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:48,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:48,835 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:49,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:49,026 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:49,027 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:40:49,027 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [28], [31] [2019-01-18 17:40:49,028 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:49,028 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:49,030 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:49,030 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:40:49,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:49,030 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:49,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:49,031 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:49,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:49,040 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:49,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:49,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,066 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 [2019-01-18 17:40:49,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,102 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-01-18 17:40:49,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,145 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-01-18 17:40:49,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,201 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 [2019-01-18 17:40:49,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,270 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 [2019-01-18 17:40:49,271 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:49,295 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:49,320 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:49,346 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:49,371 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:49,404 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-18 17:40:49,407 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-18 17:40:49,410 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 29 treesize of output 43 [2019-01-18 17:40:49,413 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 31 treesize of output 57 [2019-01-18 17:40:49,415 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 33 treesize of output 75 [2019-01-18 17:40:49,419 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:40:49,427 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 37 treesize of output 96 [2019-01-18 17:40:49,428 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:49,481 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:49,510 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:49,531 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:49,549 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:49,564 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:49,579 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:49,636 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. [2019-01-18 17:40:49,637 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-18 17:40:49,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,683 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 100 [2019-01-18 17:40:49,684 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:40:49,845 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. [2019-01-18 17:40:49,845 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:106, output treesize:150 [2019-01-18 17:40:49,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,110 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:50,110 INFO L303 Elim1Store]: Index analysis took 205 ms [2019-01-18 17:40:50,111 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 112 [2019-01-18 17:40:50,112 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:50,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,383 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:50,392 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 131 [2019-01-18 17:40:50,393 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-01-18 17:40:50,600 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: 13 dim-0 vars, and 3 xjuncts. [2019-01-18 17:40:50,601 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 11 variables, input treesize:172, output treesize:185 [2019-01-18 17:40:50,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,750 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 78 treesize of output 136 [2019-01-18 17:40:50,755 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2019-01-18 17:40:51,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:51,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:51,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:51,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:51,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:51,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:51,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:51,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:51,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:51,205 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:51,205 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 105 [2019-01-18 17:40:51,206 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:51,404 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 2 dim-1 vars, End of recursive call: 31 dim-0 vars, and 6 xjuncts. [2019-01-18 17:40:51,404 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 13 variables, input treesize:152, output treesize:346 [2019-01-18 17:40:51,667 WARN L181 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 109 [2019-01-18 17:40:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:51,668 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:51,732 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:51,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 17:40:51,733 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:51,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:40:51,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:40:51,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:40:51,733 INFO L87 Difference]: Start difference. First operand 92 states and 486 transitions. Second operand 10 states. [2019-01-18 17:40:52,102 WARN L181 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 89 [2019-01-18 17:40:57,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:57,536 INFO L93 Difference]: Finished difference Result 155 states and 683 transitions. [2019-01-18 17:40:57,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-18 17:40:57,538 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:40:57,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:57,540 INFO L225 Difference]: With dead ends: 155 [2019-01-18 17:40:57,540 INFO L226 Difference]: Without dead ends: 154 [2019-01-18 17:40:57,540 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-01-18 17:40:57,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-01-18 17:40:57,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 98. [2019-01-18 17:40:57,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-01-18 17:40:57,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 534 transitions. [2019-01-18 17:40:57,577 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 534 transitions. Word has length 5 [2019-01-18 17:40:57,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:57,577 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 534 transitions. [2019-01-18 17:40:57,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:40:57,578 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 534 transitions. [2019-01-18 17:40:57,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:40:57,578 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:57,578 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:40:57,579 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:57,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:57,579 INFO L82 PathProgramCache]: Analyzing trace with hash 29193322, now seen corresponding path program 1 times [2019-01-18 17:40:57,579 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:57,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:57,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:57,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:57,580 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:57,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:57,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:57,629 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:57,630 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:40:57,630 INFO L207 CegarAbsIntRunner]: [0], [18], [28], [32], [33] [2019-01-18 17:40:57,630 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:57,631 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:57,632 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:57,633 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:40:57,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:57,633 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:57,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:57,633 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:57,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:57,642 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:57,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:57,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:57,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,675 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 91 treesize of output 91 [2019-01-18 17:40:57,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,722 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 78 treesize of output 84 [2019-01-18 17:40:57,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,773 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 63 treesize of output 86 [2019-01-18 17:40:57,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,834 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 51 treesize of output 91 [2019-01-18 17:40:57,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,997 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 17:40:58,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,094 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 17:40:58,094 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:58,133 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:58,172 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:58,211 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:58,251 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:58,290 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:58,342 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 27 [2019-01-18 17:40:58,344 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-18 17:40:58,346 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-18 17:40:58,349 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:40:58,352 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-18 17:40:58,354 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:40:58,357 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 37 treesize of output 120 [2019-01-18 17:40:58,357 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:58,406 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:58,434 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:58,456 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:58,473 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:58,488 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:58,502 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:58,566 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. [2019-01-18 17:40:58,566 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 6 variables, input treesize:118, output treesize:120 [2019-01-18 17:40:58,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,594 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-18 17:40:58,594 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:58,653 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. [2019-01-18 17:40:58,653 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-18 17:40:58,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,684 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-18 17:40:58,685 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:58,751 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:58,751 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-18 17:40:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:58,778 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:58,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:58,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:58,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:40:58,819 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:58,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:40:58,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:40:58,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:40:58,819 INFO L87 Difference]: Start difference. First operand 98 states and 534 transitions. Second operand 8 states. [2019-01-18 17:40:59,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:59,412 INFO L93 Difference]: Finished difference Result 137 states and 601 transitions. [2019-01-18 17:40:59,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:40:59,413 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 17:40:59,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:59,415 INFO L225 Difference]: With dead ends: 137 [2019-01-18 17:40:59,415 INFO L226 Difference]: Without dead ends: 132 [2019-01-18 17:40:59,416 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:40:59,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-01-18 17:40:59,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 100. [2019-01-18 17:40:59,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-01-18 17:40:59,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 556 transitions. [2019-01-18 17:40:59,456 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 556 transitions. Word has length 5 [2019-01-18 17:40:59,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:59,456 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 556 transitions. [2019-01-18 17:40:59,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:40:59,457 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 556 transitions. [2019-01-18 17:40:59,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:40:59,457 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:59,457 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:40:59,457 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:59,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:59,458 INFO L82 PathProgramCache]: Analyzing trace with hash 29193134, now seen corresponding path program 2 times [2019-01-18 17:40:59,458 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:59,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:59,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:59,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:59,459 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:59,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:59,522 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:59,523 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 17:40:59,523 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 17:40:59,523 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:59,523 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:59,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 17:40:59,532 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 17:40:59,539 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-18 17:40:59,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 17:40:59,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:59,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,570 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 91 treesize of output 91 [2019-01-18 17:40:59,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,616 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 78 treesize of output 84 [2019-01-18 17:40:59,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,662 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 63 treesize of output 86 [2019-01-18 17:40:59,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,723 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 51 treesize of output 91 [2019-01-18 17:40:59,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,801 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 17:40:59,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:59,900 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 17:40:59,900 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:59,939 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:59,978 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,016 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,056 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,096 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 27 [2019-01-18 17:41:00,151 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-18 17:41:00,153 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-18 17:41:00,156 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:41:00,159 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-18 17:41:00,162 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:41:00,168 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 37 treesize of output 120 [2019-01-18 17:41:00,169 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,216 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,245 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,267 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,284 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,299 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,312 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,374 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. [2019-01-18 17:41:00,374 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 5 variables, input treesize:118, output treesize:120 [2019-01-18 17:41:00,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,410 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-18 17:41:00,410 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,470 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. [2019-01-18 17:41:00,470 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:130, output treesize:96 [2019-01-18 17:41:00,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,510 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-18 17:41:00,511 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,575 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. [2019-01-18 17:41:00,575 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:108, output treesize:78 [2019-01-18 17:41:00,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,617 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:00,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,619 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 151 [2019-01-18 17:41:00,620 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,686 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:00,686 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:88, output treesize:64 [2019-01-18 17:41:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:00,709 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:00,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:00,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:41:00,767 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:00,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:41:00,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:41:00,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:41:00,767 INFO L87 Difference]: Start difference. First operand 100 states and 556 transitions. Second operand 10 states. [2019-01-18 17:41:01,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:01,484 INFO L93 Difference]: Finished difference Result 154 states and 681 transitions. [2019-01-18 17:41:01,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:41:01,484 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:41:01,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:01,487 INFO L225 Difference]: With dead ends: 154 [2019-01-18 17:41:01,487 INFO L226 Difference]: Without dead ends: 152 [2019-01-18 17:41:01,488 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 [2019-01-18 17:41:01,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-01-18 17:41:01,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 109. [2019-01-18 17:41:01,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-01-18 17:41:01,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 628 transitions. [2019-01-18 17:41:01,545 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 628 transitions. Word has length 5 [2019-01-18 17:41:01,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:01,545 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 628 transitions. [2019-01-18 17:41:01,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:41:01,545 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 628 transitions. [2019-01-18 17:41:01,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:41:01,546 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:01,546 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:41:01,546 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:01,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:01,547 INFO L82 PathProgramCache]: Analyzing trace with hash 29179868, now seen corresponding path program 1 times [2019-01-18 17:41:01,547 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:01,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:01,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 17:41:01,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:01,548 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:01,834 WARN L181 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-01-18 17:41:01,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:01,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:01,844 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:01,844 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:41:01,844 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [32], [33] [2019-01-18 17:41:01,845 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:01,845 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:01,847 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:01,847 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:41:01,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:01,847 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:01,848 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:01,848 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:01,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:01,856 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:01,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:01,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:01,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,886 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 [2019-01-18 17:41:01,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,922 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 [2019-01-18 17:41:01,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,966 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-01-18 17:41:02,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,020 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-18 17:41:02,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,089 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 [2019-01-18 17:41:02,089 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:02,115 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:02,140 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:02,166 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:02,191 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:02,225 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 24 treesize of output 27 [2019-01-18 17:41:02,228 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 27 treesize of output 33 [2019-01-18 17:41:02,232 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 29 treesize of output 43 [2019-01-18 17:41:02,233 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 31 treesize of output 57 [2019-01-18 17:41:02,236 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 33 treesize of output 75 [2019-01-18 17:41:02,238 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:41:02,245 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-18 17:41:02,245 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:02,279 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:02,307 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:02,328 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:02,346 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:02,360 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:02,373 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:02,419 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. [2019-01-18 17:41:02,419 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-18 17:41:02,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,465 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 [2019-01-18 17:41:02,465 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:02,506 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. [2019-01-18 17:41:02,507 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 17:41:02,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,537 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 [2019-01-18 17:41:02,537 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:02,583 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. [2019-01-18 17:41:02,583 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:57 [2019-01-18 17:41:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:02,604 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:02,642 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:02,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:41:02,642 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:02,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:41:02,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:41:02,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:41:02,643 INFO L87 Difference]: Start difference. First operand 109 states and 628 transitions. Second operand 8 states. [2019-01-18 17:41:03,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:03,068 INFO L93 Difference]: Finished difference Result 140 states and 686 transitions. [2019-01-18 17:41:03,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:41:03,068 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 17:41:03,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:03,071 INFO L225 Difference]: With dead ends: 140 [2019-01-18 17:41:03,071 INFO L226 Difference]: Without dead ends: 139 [2019-01-18 17:41:03,072 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:41:03,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-01-18 17:41:03,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2019-01-18 17:41:03,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-01-18 17:41:03,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 652 transitions. [2019-01-18 17:41:03,115 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 652 transitions. Word has length 5 [2019-01-18 17:41:03,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:03,115 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 652 transitions. [2019-01-18 17:41:03,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:41:03,115 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 652 transitions. [2019-01-18 17:41:03,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:41:03,116 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:03,116 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:41:03,117 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:03,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:03,117 INFO L82 PathProgramCache]: Analyzing trace with hash 29179680, now seen corresponding path program 1 times [2019-01-18 17:41:03,117 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:03,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:03,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:03,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:03,118 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:03,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:03,256 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:03,256 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:41:03,256 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [26], [31] [2019-01-18 17:41:03,257 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:03,257 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:03,259 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:03,259 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:41:03,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:03,259 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:03,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:03,259 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:03,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:03,267 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:03,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:03,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:03,296 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 24 treesize of output 27 [2019-01-18 17:41:03,302 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 27 treesize of output 33 [2019-01-18 17:41:03,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,307 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 29 treesize of output 43 [2019-01-18 17:41:03,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,315 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:41:03,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,322 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 33 treesize of output 75 [2019-01-18 17:41:03,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,334 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:41:03,343 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 37 treesize of output 96 [2019-01-18 17:41:03,344 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,382 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,411 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,434 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,453 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,469 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,575 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,608 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 [2019-01-18 17:41:03,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,645 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 [2019-01-18 17:41:03,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,686 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 [2019-01-18 17:41:03,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,742 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 [2019-01-18 17:41:03,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,810 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 [2019-01-18 17:41:03,811 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,835 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,859 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,884 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,909 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,955 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. [2019-01-18 17:41:03,955 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-18 17:41:04,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,017 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 [2019-01-18 17:41:04,017 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:04,058 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. [2019-01-18 17:41:04,059 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 17:41:04,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,093 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 [2019-01-18 17:41:04,094 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:04,138 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. [2019-01-18 17:41:04,139 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-18 17:41:04,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,179 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:04,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,181 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 [2019-01-18 17:41:04,181 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:04,229 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. [2019-01-18 17:41:04,229 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-18 17:41:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:04,252 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:04,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:04,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:41:04,307 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:04,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:41:04,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:41:04,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:41:04,308 INFO L87 Difference]: Start difference. First operand 112 states and 652 transitions. Second operand 10 states. [2019-01-18 17:41:04,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:04,976 INFO L93 Difference]: Finished difference Result 161 states and 770 transitions. [2019-01-18 17:41:04,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:41:04,976 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:41:04,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:04,978 INFO L225 Difference]: With dead ends: 161 [2019-01-18 17:41:04,978 INFO L226 Difference]: Without dead ends: 159 [2019-01-18 17:41:04,979 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 [2019-01-18 17:41:04,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-01-18 17:41:05,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 121. [2019-01-18 17:41:05,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-01-18 17:41:05,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 724 transitions. [2019-01-18 17:41:05,026 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 724 transitions. Word has length 5 [2019-01-18 17:41:05,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:05,026 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 724 transitions. [2019-01-18 17:41:05,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:41:05,027 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 724 transitions. [2019-01-18 17:41:05,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:41:05,027 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:05,027 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:41:05,027 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:05,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:05,028 INFO L82 PathProgramCache]: Analyzing trace with hash 28830064, now seen corresponding path program 1 times [2019-01-18 17:41:05,028 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:05,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:05,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:05,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:05,028 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:05,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:41:05,151 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:05,152 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:05,152 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:41:05,152 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [32], [33] [2019-01-18 17:41:05,154 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:05,154 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:05,157 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:05,157 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:41:05,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:05,157 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:05,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:05,157 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:05,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:05,168 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:05,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:05,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,200 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 [2019-01-18 17:41:05,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,241 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 [2019-01-18 17:41:05,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,287 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 46 treesize of output 72 [2019-01-18 17:41:05,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,345 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-01-18 17:41:05,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,418 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 [2019-01-18 17:41:05,419 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:05,454 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:05,488 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:05,523 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:05,562 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:05,609 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 24 treesize of output 27 [2019-01-18 17:41:05,612 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 27 treesize of output 33 [2019-01-18 17:41:05,613 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 29 treesize of output 43 [2019-01-18 17:41:05,616 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 31 treesize of output 57 [2019-01-18 17:41:05,619 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 33 treesize of output 75 [2019-01-18 17:41:05,622 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:41:05,632 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 37 treesize of output 96 [2019-01-18 17:41:05,632 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:05,668 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:05,700 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:05,721 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:05,738 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:05,752 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:05,764 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:05,811 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. [2019-01-18 17:41:05,811 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-18 17:41:05,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,856 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-18 17:41:05,857 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:05,899 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. [2019-01-18 17:41:05,899 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 17:41:05,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,988 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:05,988 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 105 [2019-01-18 17:41:05,989 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:06,032 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. [2019-01-18 17:41:06,033 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:59 [2019-01-18 17:41:06,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:06,053 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:06,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:06,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:41:06,093 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:06,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:41:06,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:41:06,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:41:06,094 INFO L87 Difference]: Start difference. First operand 121 states and 724 transitions. Second operand 8 states. [2019-01-18 17:41:06,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:06,538 INFO L93 Difference]: Finished difference Result 156 states and 773 transitions. [2019-01-18 17:41:06,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:41:06,538 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 17:41:06,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:06,540 INFO L225 Difference]: With dead ends: 156 [2019-01-18 17:41:06,540 INFO L226 Difference]: Without dead ends: 154 [2019-01-18 17:41:06,541 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:41:06,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-01-18 17:41:06,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 123. [2019-01-18 17:41:06,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-01-18 17:41:06,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 733 transitions. [2019-01-18 17:41:06,600 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 733 transitions. Word has length 5 [2019-01-18 17:41:06,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:06,600 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 733 transitions. [2019-01-18 17:41:06,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:41:06,600 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 733 transitions. [2019-01-18 17:41:06,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:41:06,601 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:06,601 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:41:06,601 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:06,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:06,602 INFO L82 PathProgramCache]: Analyzing trace with hash 28818532, now seen corresponding path program 1 times [2019-01-18 17:41:06,602 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:06,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:06,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:06,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:06,602 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:06,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:06,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:06,648 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:06,648 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:41:06,648 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [32], [33] [2019-01-18 17:41:06,651 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:06,651 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:06,653 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:06,653 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:41:06,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:06,654 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:06,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:06,654 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:06,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:06,662 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:06,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:06,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,692 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 [2019-01-18 17:41:06,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,729 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 [2019-01-18 17:41:06,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,773 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 [2019-01-18 17:41:06,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,828 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 [2019-01-18 17:41:06,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,897 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 [2019-01-18 17:41:06,898 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:06,924 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:06,949 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:06,975 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:07,000 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:07,034 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 24 treesize of output 27 [2019-01-18 17:41:07,037 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 27 treesize of output 33 [2019-01-18 17:41:07,040 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 29 treesize of output 43 [2019-01-18 17:41:07,043 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 31 treesize of output 57 [2019-01-18 17:41:07,047 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 33 treesize of output 75 [2019-01-18 17:41:07,051 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:41:07,058 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 37 treesize of output 96 [2019-01-18 17:41:07,059 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:07,093 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:07,121 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:07,143 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:07,161 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:07,175 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:07,188 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:07,235 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. [2019-01-18 17:41:07,235 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2019-01-18 17:41:07,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,268 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 [2019-01-18 17:41:07,268 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:07,310 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. [2019-01-18 17:41:07,311 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2019-01-18 17:41:07,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,530 INFO L303 Elim1Store]: Index analysis took 201 ms [2019-01-18 17:41:07,531 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 [2019-01-18 17:41:07,531 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:07,596 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. [2019-01-18 17:41:07,597 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2019-01-18 17:41:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:07,613 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:07,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:07,642 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:07,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 17:41:07,643 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:07,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:41:07,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:41:07,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2019-01-18 17:41:07,644 INFO L87 Difference]: Start difference. First operand 123 states and 733 transitions. Second operand 8 states. [2019-01-18 17:41:07,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:07,970 INFO L93 Difference]: Finished difference Result 168 states and 891 transitions. [2019-01-18 17:41:07,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:41:07,970 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 17:41:07,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:07,973 INFO L225 Difference]: With dead ends: 168 [2019-01-18 17:41:07,973 INFO L226 Difference]: Without dead ends: 167 [2019-01-18 17:41:07,973 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:41:07,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-01-18 17:41:08,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 139. [2019-01-18 17:41:08,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-01-18 17:41:08,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 865 transitions. [2019-01-18 17:41:08,031 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 865 transitions. Word has length 5 [2019-01-18 17:41:08,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:08,031 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 865 transitions. [2019-01-18 17:41:08,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:41:08,031 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 865 transitions. [2019-01-18 17:41:08,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:41:08,031 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:08,031 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:41:08,032 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:08,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:08,032 INFO L82 PathProgramCache]: Analyzing trace with hash 28818344, now seen corresponding path program 1 times [2019-01-18 17:41:08,032 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:08,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:08,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:08,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:08,033 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:08,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:08,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:08,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:08,200 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:08,201 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:41:08,201 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [26], [31] [2019-01-18 17:41:08,202 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:08,202 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:08,205 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:08,205 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:41:08,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:08,205 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:08,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:08,205 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:08,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:08,219 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:08,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:08,264 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 24 treesize of output 27 [2019-01-18 17:41:08,266 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 27 treesize of output 33 [2019-01-18 17:41:08,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,271 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 29 treesize of output 43 [2019-01-18 17:41:08,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,279 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 31 treesize of output 57 [2019-01-18 17:41:08,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,288 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 33 treesize of output 75 [2019-01-18 17:41:08,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,298 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:41:08,309 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 37 treesize of output 96 [2019-01-18 17:41:08,309 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,346 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,377 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,400 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,420 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,435 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,450 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,485 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 [2019-01-18 17:41:08,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,521 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 [2019-01-18 17:41:08,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,564 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 [2019-01-18 17:41:08,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,618 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-18 17:41:08,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,684 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 [2019-01-18 17:41:08,685 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,710 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,734 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,758 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,781 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,827 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. [2019-01-18 17:41:08,828 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-18 17:41:08,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,880 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-18 17:41:08,881 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,924 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. [2019-01-18 17:41:08,924 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 17:41:08,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,953 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-18 17:41:08,953 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:09,000 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. [2019-01-18 17:41:09,001 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2019-01-18 17:41:09,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,036 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:09,037 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-18 17:41:09,037 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:09,086 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. [2019-01-18 17:41:09,086 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:49 [2019-01-18 17:41:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:09,104 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:09,148 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:09,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 17:41:09,148 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:09,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:41:09,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:41:09,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:41:09,149 INFO L87 Difference]: Start difference. First operand 139 states and 865 transitions. Second operand 10 states. [2019-01-18 17:41:09,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:09,814 INFO L93 Difference]: Finished difference Result 242 states and 1262 transitions. [2019-01-18 17:41:09,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-18 17:41:09,814 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:41:09,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:09,817 INFO L225 Difference]: With dead ends: 242 [2019-01-18 17:41:09,817 INFO L226 Difference]: Without dead ends: 240 [2019-01-18 17:41:09,818 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2019-01-18 17:41:09,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-01-18 17:41:09,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 178. [2019-01-18 17:41:09,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-01-18 17:41:09,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 1177 transitions. [2019-01-18 17:41:09,895 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 1177 transitions. Word has length 5 [2019-01-18 17:41:09,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:09,895 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 1177 transitions. [2019-01-18 17:41:09,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:41:09,895 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 1177 transitions. [2019-01-18 17:41:09,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:41:09,896 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:09,896 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:41:09,896 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:09,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:09,897 INFO L82 PathProgramCache]: Analyzing trace with hash 28835830, now seen corresponding path program 1 times [2019-01-18 17:41:09,897 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:09,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:09,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:09,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:09,898 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:09,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:10,039 WARN L181 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2019-01-18 17:41:10,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:41:10,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:10,050 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:10,050 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:41:10,050 INFO L207 CegarAbsIntRunner]: [0], [6], [28], [32], [33] [2019-01-18 17:41:10,051 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:10,051 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:10,053 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:10,053 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:41:10,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:10,054 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:10,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:10,054 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:10,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:10,062 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:10,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:10,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:10,096 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 27 [2019-01-18 17:41:10,099 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 27 treesize of output 33 [2019-01-18 17:41:10,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,103 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 29 treesize of output 43 [2019-01-18 17:41:10,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,110 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 31 treesize of output 57 [2019-01-18 17:41:10,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,120 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 33 treesize of output 75 [2019-01-18 17:41:10,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,129 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:41:10,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,139 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-18 17:41:10,140 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:10,196 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:10,228 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:10,252 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:10,273 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:10,289 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:10,304 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:10,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,344 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 91 treesize of output 91 [2019-01-18 17:41:10,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,390 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 78 treesize of output 84 [2019-01-18 17:41:10,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,440 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 63 treesize of output 86 [2019-01-18 17:41:10,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,501 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 51 treesize of output 91 [2019-01-18 17:41:10,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,578 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 17:41:10,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,674 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 17:41:10,675 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:10,712 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:10,749 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:10,787 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:10,825 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:10,864 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:10,928 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. [2019-01-18 17:41:10,928 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 6 variables, input treesize:118, output treesize:120 [2019-01-18 17:41:10,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,956 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-18 17:41:10,957 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:11,022 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. [2019-01-18 17:41:11,022 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-18 17:41:11,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:11,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:11,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:11,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:11,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:11,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:11,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:11,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:11,054 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:11,055 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 134 [2019-01-18 17:41:11,056 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:11,118 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:11,119 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:80 [2019-01-18 17:41:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:11,141 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:11,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:11,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:41:11,181 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:11,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:41:11,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:41:11,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:41:11,181 INFO L87 Difference]: Start difference. First operand 178 states and 1177 transitions. Second operand 8 states. [2019-01-18 17:41:11,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:11,744 INFO L93 Difference]: Finished difference Result 211 states and 1231 transitions. [2019-01-18 17:41:11,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:41:11,744 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 17:41:11,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:11,747 INFO L225 Difference]: With dead ends: 211 [2019-01-18 17:41:11,747 INFO L226 Difference]: Without dead ends: 203 [2019-01-18 17:41:11,748 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 [2019-01-18 17:41:11,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-01-18 17:41:11,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 176. [2019-01-18 17:41:11,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-01-18 17:41:11,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 1188 transitions. [2019-01-18 17:41:11,831 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 1188 transitions. Word has length 5 [2019-01-18 17:41:11,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:11,831 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 1188 transitions. [2019-01-18 17:41:11,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:41:11,831 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 1188 transitions. [2019-01-18 17:41:11,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:41:11,832 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:11,832 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:41:11,833 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:11,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:11,833 INFO L82 PathProgramCache]: Analyzing trace with hash 28822376, now seen corresponding path program 1 times [2019-01-18 17:41:11,833 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:11,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:11,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:11,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:11,834 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:12,111 WARN L181 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-01-18 17:41:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:41:12,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:12,233 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:12,233 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:41:12,233 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [32], [33] [2019-01-18 17:41:12,234 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:12,234 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:12,236 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:12,236 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:41:12,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:12,237 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:12,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:12,237 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:12,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:12,245 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:12,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:12,270 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 24 treesize of output 27 [2019-01-18 17:41:12,273 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 27 treesize of output 33 [2019-01-18 17:41:12,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,279 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 29 treesize of output 43 [2019-01-18 17:41:12,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,286 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 31 treesize of output 57 [2019-01-18 17:41:12,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,294 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 33 treesize of output 75 [2019-01-18 17:41:12,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,303 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:41:12,313 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 37 treesize of output 96 [2019-01-18 17:41:12,313 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:12,353 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:12,385 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:12,409 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:12,429 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:12,446 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:12,459 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:12,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,495 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 [2019-01-18 17:41:12,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,533 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 [2019-01-18 17:41:12,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,576 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 [2019-01-18 17:41:12,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,637 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 [2019-01-18 17:41:12,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,704 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 [2019-01-18 17:41:12,704 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:12,729 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:12,753 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:12,777 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:12,802 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:12,848 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. [2019-01-18 17:41:12,849 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-18 17:41:12,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,895 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 [2019-01-18 17:41:12,895 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:12,936 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. [2019-01-18 17:41:12,937 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 17:41:12,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:12,970 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:12,970 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 [2019-01-18 17:41:12,971 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:13,013 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. [2019-01-18 17:41:13,013 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:59 [2019-01-18 17:41:13,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:13,037 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:13,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:13,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:13,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:41:13,074 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:13,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:41:13,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:41:13,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:41:13,075 INFO L87 Difference]: Start difference. First operand 176 states and 1188 transitions. Second operand 8 states. [2019-01-18 17:41:13,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:13,499 INFO L93 Difference]: Finished difference Result 201 states and 1233 transitions. [2019-01-18 17:41:13,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:41:13,499 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 17:41:13,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:13,502 INFO L225 Difference]: With dead ends: 201 [2019-01-18 17:41:13,502 INFO L226 Difference]: Without dead ends: 200 [2019-01-18 17:41:13,503 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:41:13,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-01-18 17:41:13,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 178. [2019-01-18 17:41:13,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-01-18 17:41:13,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 1204 transitions. [2019-01-18 17:41:13,576 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 1204 transitions. Word has length 5 [2019-01-18 17:41:13,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:13,576 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 1204 transitions. [2019-01-18 17:41:13,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:41:13,576 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 1204 transitions. [2019-01-18 17:41:13,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:41:13,577 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:13,577 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:41:13,577 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:13,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:13,577 INFO L82 PathProgramCache]: Analyzing trace with hash 29302192, now seen corresponding path program 1 times [2019-01-18 17:41:13,578 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:13,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:13,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:13,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:13,578 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:13,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:13,737 WARN L181 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-01-18 17:41:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:14,101 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:14,101 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:14,101 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:41:14,101 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [22], [31] [2019-01-18 17:41:14,102 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:14,102 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:14,105 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:14,105 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:41:14,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:14,106 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:14,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:14,106 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:14,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:14,122 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:14,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:14,324 WARN L181 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-01-18 17:41:14,338 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 27 [2019-01-18 17:41:14,359 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 27 treesize of output 33 [2019-01-18 17:41:14,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:14,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:14,420 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 29 treesize of output 43 [2019-01-18 17:41:14,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:14,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:14,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:14,494 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 31 treesize of output 57 [2019-01-18 17:41:14,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:14,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:14,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:14,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:14,605 INFO L303 Elim1Store]: Index analysis took 110 ms [2019-01-18 17:41:14,606 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 33 treesize of output 75 [2019-01-18 17:41:14,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:14,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:14,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:14,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:14,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:14,732 INFO L303 Elim1Store]: Index analysis took 124 ms [2019-01-18 17:41:14,733 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:41:14,760 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 37 treesize of output 96 [2019-01-18 17:41:14,761 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:14,805 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:14,836 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:14,861 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:14,881 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:14,895 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:14,910 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:14,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:14,945 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 [2019-01-18 17:41:14,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:14,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:14,983 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 [2019-01-18 17:41:15,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,026 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 [2019-01-18 17:41:15,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,080 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 [2019-01-18 17:41:15,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,148 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 [2019-01-18 17:41:15,148 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:15,173 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:15,197 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:15,222 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:15,247 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:15,293 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. [2019-01-18 17:41:15,293 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-18 17:41:15,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,345 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 [2019-01-18 17:41:15,346 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:15,387 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. [2019-01-18 17:41:15,387 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 17:41:15,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,422 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 [2019-01-18 17:41:15,423 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:15,464 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. [2019-01-18 17:41:15,464 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2019-01-18 17:41:15,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,502 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:15,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:15,504 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 [2019-01-18 17:41:15,505 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:15,553 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. [2019-01-18 17:41:15,553 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-18 17:41:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:15,575 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:15,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:15,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:15,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:41:15,631 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:15,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:41:15,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:41:15,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:41:15,631 INFO L87 Difference]: Start difference. First operand 178 states and 1204 transitions. Second operand 10 states. [2019-01-18 17:41:16,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:16,376 INFO L93 Difference]: Finished difference Result 245 states and 1358 transitions. [2019-01-18 17:41:16,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:41:16,377 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:41:16,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:16,380 INFO L225 Difference]: With dead ends: 245 [2019-01-18 17:41:16,381 INFO L226 Difference]: Without dead ends: 243 [2019-01-18 17:41:16,381 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 [2019-01-18 17:41:16,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-01-18 17:41:16,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 191. [2019-01-18 17:41:16,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-01-18 17:41:16,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 1287 transitions. [2019-01-18 17:41:16,467 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 1287 transitions. Word has length 5 [2019-01-18 17:41:16,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:16,467 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 1287 transitions. [2019-01-18 17:41:16,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:41:16,467 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 1287 transitions. [2019-01-18 17:41:16,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:41:16,468 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:16,468 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:41:16,468 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:16,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:16,468 INFO L82 PathProgramCache]: Analyzing trace with hash 29295188, now seen corresponding path program 1 times [2019-01-18 17:41:16,468 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:16,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:16,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:16,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:16,469 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:16,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:16,564 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:16,564 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:41:16,565 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [32], [33] [2019-01-18 17:41:16,566 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:16,566 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:16,567 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:16,567 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:41:16,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:16,568 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:16,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:16,568 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:16,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:16,577 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:16,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:16,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,606 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 [2019-01-18 17:41:16,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,642 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-01-18 17:41:16,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,686 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 [2019-01-18 17:41:16,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,741 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 [2019-01-18 17:41:16,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,808 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 [2019-01-18 17:41:16,808 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:16,834 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:16,858 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:16,884 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:16,910 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:16,946 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-18 17:41:16,949 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-18 17:41:16,952 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 29 treesize of output 43 [2019-01-18 17:41:16,954 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 31 treesize of output 57 [2019-01-18 17:41:16,957 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 33 treesize of output 75 [2019-01-18 17:41:16,960 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:41:16,966 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-18 17:41:16,967 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:17,001 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:17,029 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:17,050 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:17,068 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:17,082 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:17,094 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:17,140 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. [2019-01-18 17:41:17,140 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2019-01-18 17:41:17,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,173 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 [2019-01-18 17:41:17,174 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:17,217 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. [2019-01-18 17:41:17,217 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2019-01-18 17:41:17,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,247 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 [2019-01-18 17:41:17,248 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:17,292 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. [2019-01-18 17:41:17,292 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2019-01-18 17:41:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:17,311 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:17,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:17,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2019-01-18 17:41:17,334 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:17,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:41:17,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:41:17,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2019-01-18 17:41:17,334 INFO L87 Difference]: Start difference. First operand 191 states and 1287 transitions. Second operand 8 states. [2019-01-18 17:41:17,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:17,696 INFO L93 Difference]: Finished difference Result 343 states and 2333 transitions. [2019-01-18 17:41:17,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:41:17,696 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 17:41:17,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:17,701 INFO L225 Difference]: With dead ends: 343 [2019-01-18 17:41:17,702 INFO L226 Difference]: Without dead ends: 342 [2019-01-18 17:41:17,702 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2019-01-18 17:41:17,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2019-01-18 17:41:17,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 304. [2019-01-18 17:41:17,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2019-01-18 17:41:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 2201 transitions. [2019-01-18 17:41:17,822 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 2201 transitions. Word has length 5 [2019-01-18 17:41:17,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:17,822 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 2201 transitions. [2019-01-18 17:41:17,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:41:17,822 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 2201 transitions. [2019-01-18 17:41:17,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:41:17,823 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:17,823 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:41:17,824 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:17,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:17,824 INFO L82 PathProgramCache]: Analyzing trace with hash 29295000, now seen corresponding path program 1 times [2019-01-18 17:41:17,824 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:17,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:17,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:17,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:17,825 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:18,232 WARN L181 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2019-01-18 17:41:18,583 WARN L181 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2019-01-18 17:41:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:18,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:18,645 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:18,645 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:41:18,645 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [26], [31] [2019-01-18 17:41:18,646 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:18,646 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:18,648 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:18,649 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:41:18,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:18,649 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:18,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:18,649 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:18,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:18,660 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:18,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:18,685 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 24 treesize of output 27 [2019-01-18 17:41:18,688 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 27 treesize of output 33 [2019-01-18 17:41:18,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,701 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 29 treesize of output 43 [2019-01-18 17:41:18,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,707 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 31 treesize of output 57 [2019-01-18 17:41:18,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,715 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-18 17:41:18,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,724 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:41:18,733 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-18 17:41:18,733 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:18,772 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:18,803 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:18,827 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:18,847 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:18,868 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:18,884 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:18,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,915 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 [2019-01-18 17:41:18,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,951 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 [2019-01-18 17:41:18,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,996 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 [2019-01-18 17:41:19,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,050 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-01-18 17:41:19,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,117 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 [2019-01-18 17:41:19,118 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:19,142 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:19,167 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:19,191 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:19,216 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:19,262 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. [2019-01-18 17:41:19,263 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-18 17:41:19,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,322 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 [2019-01-18 17:41:19,322 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:19,364 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. [2019-01-18 17:41:19,364 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 17:41:19,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,396 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-18 17:41:19,396 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:19,441 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. [2019-01-18 17:41:19,441 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2019-01-18 17:41:19,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,482 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:19,482 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 [2019-01-18 17:41:19,483 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:19,533 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. [2019-01-18 17:41:19,533 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:49 [2019-01-18 17:41:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:19,554 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:19,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:19,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:41:19,609 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:19,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:41:19,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:41:19,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:41:19,609 INFO L87 Difference]: Start difference. First operand 304 states and 2201 transitions. Second operand 10 states. [2019-01-18 17:41:21,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:21,296 INFO L93 Difference]: Finished difference Result 369 states and 2390 transitions. [2019-01-18 17:41:21,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:41:21,297 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:41:21,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:21,301 INFO L225 Difference]: With dead ends: 369 [2019-01-18 17:41:21,301 INFO L226 Difference]: Without dead ends: 367 [2019-01-18 17:41:21,301 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:41:21,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2019-01-18 17:41:21,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 320. [2019-01-18 17:41:21,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-01-18 17:41:21,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 2329 transitions. [2019-01-18 17:41:21,423 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 2329 transitions. Word has length 5 [2019-01-18 17:41:21,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:21,424 INFO L480 AbstractCegarLoop]: Abstraction has 320 states and 2329 transitions. [2019-01-18 17:41:21,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:41:21,424 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 2329 transitions. [2019-01-18 17:41:21,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:41:21,425 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:21,425 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:41:21,425 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:21,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:21,425 INFO L82 PathProgramCache]: Analyzing trace with hash 29312486, now seen corresponding path program 1 times [2019-01-18 17:41:21,425 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:21,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:21,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:21,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:21,426 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:21,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:21,491 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:21,491 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:41:21,491 INFO L207 CegarAbsIntRunner]: [0], [22], [28], [32], [33] [2019-01-18 17:41:21,492 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:21,492 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:21,493 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:21,494 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:41:21,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:21,494 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:21,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:21,494 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:21,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:21,505 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:21,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:21,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,542 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 91 treesize of output 91 [2019-01-18 17:41:21,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,587 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 78 treesize of output 84 [2019-01-18 17:41:21,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,638 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 63 treesize of output 86 [2019-01-18 17:41:21,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,701 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 51 treesize of output 91 [2019-01-18 17:41:21,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,783 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 17:41:21,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,885 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 17:41:21,886 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:21,939 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:21,984 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,030 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,077 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,123 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,181 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 27 [2019-01-18 17:41:22,184 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-18 17:41:22,186 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-18 17:41:22,188 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:41:22,190 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-18 17:41:22,194 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:41:22,196 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 37 treesize of output 120 [2019-01-18 17:41:22,197 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,246 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,274 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,296 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,314 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,328 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,342 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,405 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. [2019-01-18 17:41:22,406 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 6 variables, input treesize:118, output treesize:120 [2019-01-18 17:41:22,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,434 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-18 17:41:22,435 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,499 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. [2019-01-18 17:41:22,499 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-18 17:41:22,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,547 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:22,549 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 134 [2019-01-18 17:41:22,550 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,649 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:22,649 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:80 [2019-01-18 17:41:22,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:22,736 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:22,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:22,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:41:22,774 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:22,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:41:22,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:41:22,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:41:22,775 INFO L87 Difference]: Start difference. First operand 320 states and 2329 transitions. Second operand 8 states. [2019-01-18 17:41:23,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:23,398 INFO L93 Difference]: Finished difference Result 354 states and 2377 transitions. [2019-01-18 17:41:23,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:41:23,398 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 17:41:23,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:23,402 INFO L225 Difference]: With dead ends: 354 [2019-01-18 17:41:23,402 INFO L226 Difference]: Without dead ends: 350 [2019-01-18 17:41:23,403 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:41:23,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2019-01-18 17:41:23,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 323. [2019-01-18 17:41:23,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2019-01-18 17:41:23,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 2346 transitions. [2019-01-18 17:41:23,520 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 2346 transitions. Word has length 5 [2019-01-18 17:41:23,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:23,520 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 2346 transitions. [2019-01-18 17:41:23,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:41:23,521 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 2346 transitions. [2019-01-18 17:41:23,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:41:23,521 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:23,521 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:41:23,521 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:23,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:23,522 INFO L82 PathProgramCache]: Analyzing trace with hash 29299032, now seen corresponding path program 1 times [2019-01-18 17:41:23,522 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:23,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:23,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:23,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:23,523 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:23,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:23,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:23,627 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:23,627 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:41:23,627 INFO L207 CegarAbsIntRunner]: [0], [14], [22], [32], [33] [2019-01-18 17:41:23,628 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:23,628 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:23,630 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:23,631 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:41:23,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:23,631 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:23,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:23,631 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:23,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:23,647 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:23,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:23,741 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 24 treesize of output 27 [2019-01-18 17:41:23,744 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 27 treesize of output 33 [2019-01-18 17:41:23,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:23,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:23,750 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 29 treesize of output 43 [2019-01-18 17:41:23,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:23,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:23,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:23,757 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 31 treesize of output 57 [2019-01-18 17:41:23,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:23,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:23,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:23,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:23,764 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 33 treesize of output 75 [2019-01-18 17:41:23,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:23,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:23,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:23,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:23,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:23,773 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:41:23,785 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 37 treesize of output 96 [2019-01-18 17:41:23,786 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:23,824 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:23,856 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:23,879 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:23,898 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:23,914 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:23,929 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:23,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:23,963 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 [2019-01-18 17:41:23,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,001 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 [2019-01-18 17:41:24,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,051 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-01-18 17:41:24,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,103 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 [2019-01-18 17:41:24,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,173 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 [2019-01-18 17:41:24,174 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:24,198 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:24,223 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:24,247 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:24,270 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:24,323 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. [2019-01-18 17:41:24,324 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-18 17:41:24,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,363 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 [2019-01-18 17:41:24,363 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:24,406 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. [2019-01-18 17:41:24,406 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 17:41:24,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:24,434 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:24,434 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 [2019-01-18 17:41:24,435 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:24,479 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. [2019-01-18 17:41:24,479 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:59 [2019-01-18 17:41:24,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:24,500 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:24,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:24,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:24,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:41:24,539 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:24,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:41:24,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:41:24,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:41:24,540 INFO L87 Difference]: Start difference. First operand 323 states and 2346 transitions. Second operand 8 states. [2019-01-18 17:41:25,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:25,127 INFO L93 Difference]: Finished difference Result 347 states and 2375 transitions. [2019-01-18 17:41:25,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:41:25,127 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 17:41:25,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:25,131 INFO L225 Difference]: With dead ends: 347 [2019-01-18 17:41:25,132 INFO L226 Difference]: Without dead ends: 346 [2019-01-18 17:41:25,132 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:41:25,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2019-01-18 17:41:25,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 324. [2019-01-18 17:41:25,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2019-01-18 17:41:25,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 2354 transitions. [2019-01-18 17:41:25,260 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 2354 transitions. Word has length 5 [2019-01-18 17:41:25,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:25,260 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 2354 transitions. [2019-01-18 17:41:25,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:41:25,260 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 2354 transitions. [2019-01-18 17:41:25,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:41:25,261 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:25,261 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:41:25,261 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:25,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:25,261 INFO L82 PathProgramCache]: Analyzing trace with hash 28958902, now seen corresponding path program 1 times [2019-01-18 17:41:25,261 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:25,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:25,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:25,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:25,262 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:25,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:25,297 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:25,298 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:41:25,298 INFO L207 CegarAbsIntRunner]: [0], [10], [32], [34], [35] [2019-01-18 17:41:25,300 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:25,300 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:25,302 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:25,303 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:41:25,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:25,303 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:25,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:25,304 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:25,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:25,328 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:25,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:25,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,363 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-01-18 17:41:25,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,403 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 [2019-01-18 17:41:25,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,450 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 [2019-01-18 17:41:25,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,510 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 [2019-01-18 17:41:25,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,580 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 [2019-01-18 17:41:25,581 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:25,616 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:25,654 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:25,692 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:25,726 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:25,771 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-18 17:41:25,773 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 27 treesize of output 33 [2019-01-18 17:41:25,775 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 29 treesize of output 43 [2019-01-18 17:41:25,778 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 31 treesize of output 57 [2019-01-18 17:41:25,782 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 33 treesize of output 75 [2019-01-18 17:41:25,785 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:41:25,795 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 37 treesize of output 96 [2019-01-18 17:41:25,795 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:25,831 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:25,858 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:25,880 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:25,897 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:25,912 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:25,925 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:25,971 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. [2019-01-18 17:41:25,971 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2019-01-18 17:41:26,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,010 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 [2019-01-18 17:41:26,010 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:26,053 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. [2019-01-18 17:41:26,053 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2019-01-18 17:41:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:26,073 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:26,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:26,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 17:41:26,100 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:26,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 17:41:26,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 17:41:26,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:41:26,101 INFO L87 Difference]: Start difference. First operand 324 states and 2354 transitions. Second operand 6 states. [2019-01-18 17:41:26,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:26,406 INFO L93 Difference]: Finished difference Result 344 states and 2373 transitions. [2019-01-18 17:41:26,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 17:41:26,406 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2019-01-18 17:41:26,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:26,411 INFO L225 Difference]: With dead ends: 344 [2019-01-18 17:41:26,411 INFO L226 Difference]: Without dead ends: 343 [2019-01-18 17:41:26,411 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 [2019-01-18 17:41:26,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-01-18 17:41:26,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 324. [2019-01-18 17:41:26,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2019-01-18 17:41:26,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 2354 transitions. [2019-01-18 17:41:26,569 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 2354 transitions. Word has length 5 [2019-01-18 17:41:26,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:26,569 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 2354 transitions. [2019-01-18 17:41:26,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 17:41:26,570 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 2354 transitions. [2019-01-18 17:41:26,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:41:26,570 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:26,571 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:41:26,571 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:26,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:26,571 INFO L82 PathProgramCache]: Analyzing trace with hash 28945258, now seen corresponding path program 1 times [2019-01-18 17:41:26,571 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:26,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:26,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:26,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:26,572 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:26,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:26,702 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:26,702 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:41:26,703 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [28], [31] [2019-01-18 17:41:26,704 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:26,704 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:26,706 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:26,706 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:41:26,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:26,706 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:26,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:26,707 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:26,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:26,716 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:26,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:26,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:26,743 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 27 [2019-01-18 17:41:26,746 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-18 17:41:26,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,753 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 29 treesize of output 43 [2019-01-18 17:41:26,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,758 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 31 treesize of output 57 [2019-01-18 17:41:26,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,767 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 33 treesize of output 75 [2019-01-18 17:41:26,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,795 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:41:26,805 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 37 treesize of output 96 [2019-01-18 17:41:26,805 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:26,844 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:26,875 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:26,900 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:26,920 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:26,936 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:26,951 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:26,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,986 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 68 treesize of output 71 [2019-01-18 17:41:27,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,023 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 [2019-01-18 17:41:27,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,065 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 [2019-01-18 17:41:27,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,117 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 [2019-01-18 17:41:27,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,184 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 [2019-01-18 17:41:27,185 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:27,209 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:27,233 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:27,258 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:27,283 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:27,329 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. [2019-01-18 17:41:27,329 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-18 17:41:27,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,375 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 106 [2019-01-18 17:41:27,376 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:41:27,542 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. [2019-01-18 17:41:27,543 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:106, output treesize:150 [2019-01-18 17:41:27,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,619 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:27,628 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 117 [2019-01-18 17:41:27,629 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:41:27,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,847 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:27,848 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 83 treesize of output 130 [2019-01-18 17:41:27,848 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:27,986 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: 13 dim-0 vars, and 3 xjuncts. [2019-01-18 17:41:27,986 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 11 variables, input treesize:172, output treesize:189 [2019-01-18 17:41:28,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,118 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 78 treesize of output 152 [2019-01-18 17:41:28,123 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2019-01-18 17:41:28,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,601 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:28,602 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 103 [2019-01-18 17:41:28,603 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:28,796 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 2 dim-1 vars, End of recursive call: 31 dim-0 vars, and 6 xjuncts. [2019-01-18 17:41:28,796 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 13 variables, input treesize:152, output treesize:346 [2019-01-18 17:41:29,083 WARN L181 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 109 [2019-01-18 17:41:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:29,084 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:29,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:29,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:29,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 17:41:29,196 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:29,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:41:29,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:41:29,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:41:29,197 INFO L87 Difference]: Start difference. First operand 324 states and 2354 transitions. Second operand 10 states. [2019-01-18 17:41:29,446 WARN L181 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 89 [2019-01-18 17:41:33,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:33,068 INFO L93 Difference]: Finished difference Result 434 states and 2876 transitions. [2019-01-18 17:41:33,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-18 17:41:33,068 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:41:33,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:33,074 INFO L225 Difference]: With dead ends: 434 [2019-01-18 17:41:33,074 INFO L226 Difference]: Without dead ends: 432 [2019-01-18 17:41:33,075 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-01-18 17:41:33,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2019-01-18 17:41:33,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 339. [2019-01-18 17:41:33,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2019-01-18 17:41:33,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 2453 transitions. [2019-01-18 17:41:33,215 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 2453 transitions. Word has length 5 [2019-01-18 17:41:33,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:33,215 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 2453 transitions. [2019-01-18 17:41:33,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:41:33,215 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 2453 transitions. [2019-01-18 17:41:33,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:41:33,216 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:33,216 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:41:33,216 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:33,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:33,216 INFO L82 PathProgramCache]: Analyzing trace with hash 28933852, now seen corresponding path program 2 times [2019-01-18 17:41:33,216 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:33,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:33,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:33,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:33,217 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:33,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:33,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:33,281 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:33,281 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 17:41:33,281 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 17:41:33,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:33,281 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:33,291 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 17:41:33,291 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 17:41:33,296 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-01-18 17:41:33,296 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 17:41:33,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:33,326 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 24 treesize of output 27 [2019-01-18 17:41:33,329 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 27 treesize of output 33 [2019-01-18 17:41:33,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,335 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 29 treesize of output 43 [2019-01-18 17:41:33,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,342 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 31 treesize of output 57 [2019-01-18 17:41:33,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,349 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 33 treesize of output 75 [2019-01-18 17:41:33,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,358 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:41:33,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,374 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-18 17:41:33,374 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:33,428 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:33,461 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:33,483 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:33,503 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:33,519 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:33,535 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:33,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,573 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 17:41:33,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,617 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 78 treesize of output 84 [2019-01-18 17:41:33,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,667 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 63 treesize of output 86 [2019-01-18 17:41:33,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,727 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 17:41:33,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,800 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 17:41:33,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,899 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 17:41:33,900 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:33,936 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:33,973 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:34,011 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:34,050 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:34,089 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:34,153 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. [2019-01-18 17:41:34,154 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 7 variables, input treesize:118, output treesize:120 [2019-01-18 17:41:34,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,175 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-18 17:41:34,176 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:34,242 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. [2019-01-18 17:41:34,242 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-18 17:41:34,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,272 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-18 17:41:34,273 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:34,346 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:34,346 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-18 17:41:34,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:34,365 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:34,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:34,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:34,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 17:41:34,398 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:34,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:41:34,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:41:34,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2019-01-18 17:41:34,399 INFO L87 Difference]: Start difference. First operand 339 states and 2453 transitions. Second operand 8 states. [2019-01-18 17:41:35,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:35,641 INFO L93 Difference]: Finished difference Result 472 states and 3201 transitions. [2019-01-18 17:41:35,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:41:35,642 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 17:41:35,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:35,648 INFO L225 Difference]: With dead ends: 472 [2019-01-18 17:41:35,648 INFO L226 Difference]: Without dead ends: 471 [2019-01-18 17:41:35,648 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 [2019-01-18 17:41:35,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-01-18 17:41:35,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 396. [2019-01-18 17:41:35,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2019-01-18 17:41:35,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 2917 transitions. [2019-01-18 17:41:35,796 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 2917 transitions. Word has length 5 [2019-01-18 17:41:35,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:35,796 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 2917 transitions. [2019-01-18 17:41:35,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:41:35,796 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 2917 transitions. [2019-01-18 17:41:35,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:41:35,797 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:35,797 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:41:35,797 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:35,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:35,797 INFO L82 PathProgramCache]: Analyzing trace with hash 28952946, now seen corresponding path program 1 times [2019-01-18 17:41:35,798 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:35,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:35,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 17:41:35,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:35,798 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:36,233 WARN L181 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 17 [2019-01-18 17:41:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:36,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:36,309 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:36,310 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:41:36,310 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [28], [31] [2019-01-18 17:41:36,311 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:36,312 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:36,313 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:36,314 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:41:36,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:36,314 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:36,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:36,314 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:36,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:36,330 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:36,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:36,396 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 24 treesize of output 27 [2019-01-18 17:41:36,399 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 27 treesize of output 33 [2019-01-18 17:41:36,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,404 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-18 17:41:36,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,410 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 31 treesize of output 57 [2019-01-18 17:41:36,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,419 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 33 treesize of output 75 [2019-01-18 17:41:36,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,430 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:41:36,441 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 37 treesize of output 96 [2019-01-18 17:41:36,441 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,480 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,512 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,535 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,555 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,572 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,587 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,619 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 68 treesize of output 71 [2019-01-18 17:41:36,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,658 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 [2019-01-18 17:41:36,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,702 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 [2019-01-18 17:41:36,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,755 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 [2019-01-18 17:41:36,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,822 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 [2019-01-18 17:41:36,823 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,847 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,872 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,896 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,932 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,977 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. [2019-01-18 17:41:36,977 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-18 17:41:37,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 106 [2019-01-18 17:41:37,022 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:41:37,175 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. [2019-01-18 17:41:37,176 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:106, output treesize:150 [2019-01-18 17:41:37,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,231 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:37,232 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 83 treesize of output 128 [2019-01-18 17:41:37,232 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:37,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,348 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:37,357 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 133 [2019-01-18 17:41:37,358 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-01-18 17:41:37,558 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: 13 dim-0 vars, and 3 xjuncts. [2019-01-18 17:41:37,559 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 11 variables, input treesize:172, output treesize:189 [2019-01-18 17:41:37,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 78 treesize of output 136 [2019-01-18 17:41:37,698 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2019-01-18 17:41:38,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,134 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:38,135 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 73 treesize of output 109 [2019-01-18 17:41:38,136 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:38,325 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 2 dim-1 vars, End of recursive call: 31 dim-0 vars, and 6 xjuncts. [2019-01-18 17:41:38,326 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 13 variables, input treesize:152, output treesize:346 [2019-01-18 17:41:39,257 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-01-18 17:41:39,458 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:39,459 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:626) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:187) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:152) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:575) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:286) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:215) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 45 more [2019-01-18 17:41:39,464 INFO L168 Benchmark]: Toolchain (without parser) took 141864.18 ms. Allocated memory was 140.5 MB in the beginning and 427.3 MB in the end (delta: 286.8 MB). Free memory was 107.8 MB in the beginning and 95.6 MB in the end (delta: 12.2 MB). Peak memory consumption was 299.0 MB. Max. memory is 7.1 GB. [2019-01-18 17:41:39,465 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory is still 109.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-18 17:41:39,465 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.12 ms. Allocated memory is still 140.5 MB. Free memory was 107.8 MB in the beginning and 105.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2019-01-18 17:41:39,465 INFO L168 Benchmark]: Boogie Preprocessor took 25.15 ms. Allocated memory is still 140.5 MB. Free memory was 105.5 MB in the beginning and 104.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-01-18 17:41:39,465 INFO L168 Benchmark]: RCFGBuilder took 444.45 ms. Allocated memory is still 140.5 MB. Free memory was 104.1 MB in the beginning and 91.9 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2019-01-18 17:41:39,466 INFO L168 Benchmark]: TraceAbstraction took 141334.11 ms. Allocated memory was 140.5 MB in the beginning and 427.3 MB in the end (delta: 286.8 MB). Free memory was 91.7 MB in the beginning and 95.6 MB in the end (delta: -3.9 MB). Peak memory consumption was 282.9 MB. Max. memory is 7.1 GB. [2019-01-18 17:41:39,467 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory is still 109.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 56.12 ms. Allocated memory is still 140.5 MB. Free memory was 107.8 MB in the beginning and 105.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.15 ms. Allocated memory is still 140.5 MB. Free memory was 105.5 MB in the beginning and 104.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 444.45 ms. Allocated memory is still 140.5 MB. Free memory was 104.1 MB in the beginning and 91.9 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 141334.11 ms. Allocated memory was 140.5 MB in the beginning and 427.3 MB in the end (delta: 286.8 MB). Free memory was 91.7 MB in the beginning and 95.6 MB in the end (delta: -3.9 MB). Peak memory consumption was 282.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...