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-limited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b7bd044-m [2019-01-18 17:39:16,088 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-18 17:39:16,090 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-18 17:39:16,102 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-01-18 17:39:16,135 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 17:39:16,153 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-18 17:39:16,154 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-18 17:39:16,154 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-18 17:39:16,155 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-18 17:39:16,155 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-18 17:39:16,155 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-18 17:39:16,155 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-18 17:39:16,155 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-18 17:39:16,156 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-18 17:39:16,161 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-18 17:39:16,161 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-18 17:39:16,161 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-18 17:39:16,162 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-18 17:39:16,162 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-18 17:39:16,162 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-18 17:39:16,163 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-18 17:39:16,164 INFO L133 SettingsManager]: * Use SBE=true [2019-01-18 17:39:16,164 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-18 17:39:16,164 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-18 17:39:16,164 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-18 17:39:16,164 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-18 17:39:16,165 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-18 17:39:16,165 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-18 17:39:16,165 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-18 17:39:16,165 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-18 17:39:16,165 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-18 17:39:16,166 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-18 17:39:16,169 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-18 17:39:16,169 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-18 17:39:16,169 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-18 17:39:16,169 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-18 17:39:16,169 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-18 17:39:16,170 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-18 17:39:16,170 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-18 17:39:16,170 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-18 17:39:16,170 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-18 17:39:16,170 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-18 17:39:16,170 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-18 17:39:16,171 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-18 17:39:16,171 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-18 17:39:16,200 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-18 17:39:16,210 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-18 17:39:16,213 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-18 17:39:16,214 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-18 17:39:16,215 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-18 17:39:16,215 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-limited.bpl [2019-01-18 17:39:16,215 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-limited.bpl' [2019-01-18 17:39:16,251 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-18 17:39:16,253 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-18 17:39:16,254 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-18 17:39:16,254 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-18 17:39:16,254 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-18 17:39:16,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:16" (1/1) ... [2019-01-18 17:39:16,278 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:16" (1/1) ... [2019-01-18 17:39:16,304 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-18 17:39:16,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-18 17:39:16,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-18 17:39:16,306 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-18 17:39:16,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:16" (1/1) ... [2019-01-18 17:39:16,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:16" (1/1) ... [2019-01-18 17:39:16,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:16" (1/1) ... [2019-01-18 17:39:16,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:16" (1/1) ... [2019-01-18 17:39:16,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:16" (1/1) ... [2019-01-18 17:39:16,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:16" (1/1) ... [2019-01-18 17:39:16,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:16" (1/1) ... [2019-01-18 17:39:16,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-18 17:39:16,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-18 17:39:16,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-18 17:39:16,342 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-18 17:39:16,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:16" (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 17:39:16,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-18 17:39:16,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-18 17:39:16,770 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-18 17:39:16,770 INFO L286 CfgBuilder]: Removed 17 assue(true) statements. [2019-01-18 17:39:16,771 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:39:16 BoogieIcfgContainer [2019-01-18 17:39:16,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-18 17:39:16,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-18 17:39:16,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-18 17:39:16,776 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-18 17:39:16,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:16" (1/2) ... [2019-01-18 17:39:16,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38309c82 and model type speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 05:39:16, skipping insertion in model container [2019-01-18 17:39:16,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:39:16" (2/2) ... [2019-01-18 17:39:16,779 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-7-limited.bpl [2019-01-18 17:39:16,789 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-18 17:39:16,797 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-01-18 17:39:16,812 INFO L257 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-01-18 17:39:16,838 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-18 17:39:16,838 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-18 17:39:16,838 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-18 17:39:16,838 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-18 17:39:16,839 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-18 17:39:16,839 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-18 17:39:16,839 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-18 17:39:16,839 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-18 17:39:16,851 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-01-18 17:39:16,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-18 17:39:16,858 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:16,859 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-18 17:39:16,861 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:16,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:16,867 INFO L82 PathProgramCache]: Analyzing trace with hash 992, now seen corresponding path program 1 times [2019-01-18 17:39:16,868 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:16,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:16,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:16,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:16,908 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:17,062 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 17:39:17,064 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-18 17:39:17,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-18 17:39:17,065 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 17:39:17,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-18 17:39:17,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-18 17:39:17,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-18 17:39:17,087 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-01-18 17:39:17,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:17,277 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2019-01-18 17:39:17,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-18 17:39:17,281 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-18 17:39:17,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:17,295 INFO L225 Difference]: With dead ends: 33 [2019-01-18 17:39:17,295 INFO L226 Difference]: Without dead ends: 28 [2019-01-18 17:39:17,299 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 17:39:17,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-01-18 17:39:17,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 16. [2019-01-18 17:39:17,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-01-18 17:39:17,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 29 transitions. [2019-01-18 17:39:17,335 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 29 transitions. Word has length 2 [2019-01-18 17:39:17,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:17,336 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 29 transitions. [2019-01-18 17:39:17,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-18 17:39:17,337 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 29 transitions. [2019-01-18 17:39:17,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 17:39:17,337 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:17,338 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 17:39:17,338 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:17,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:17,339 INFO L82 PathProgramCache]: Analyzing trace with hash 30816, now seen corresponding path program 1 times [2019-01-18 17:39:17,339 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:17,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:17,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:17,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:17,341 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:17,411 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 17:39:17,412 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-18 17:39:17,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-18 17:39:17,412 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 17:39:17,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-18 17:39:17,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-18 17:39:17,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-18 17:39:17,416 INFO L87 Difference]: Start difference. First operand 16 states and 29 transitions. Second operand 3 states. [2019-01-18 17:39:17,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:17,708 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2019-01-18 17:39:17,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-18 17:39:17,709 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-18 17:39:17,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:17,710 INFO L225 Difference]: With dead ends: 28 [2019-01-18 17:39:17,710 INFO L226 Difference]: Without dead ends: 27 [2019-01-18 17:39:17,713 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 17:39:17,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-01-18 17:39:17,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2019-01-18 17:39:17,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-01-18 17:39:17,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 30 transitions. [2019-01-18 17:39:17,718 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 30 transitions. Word has length 3 [2019-01-18 17:39:17,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:17,719 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 30 transitions. [2019-01-18 17:39:17,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-18 17:39:17,719 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 30 transitions. [2019-01-18 17:39:17,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 17:39:17,720 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:17,721 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 17:39:17,721 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:17,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:17,722 INFO L82 PathProgramCache]: Analyzing trace with hash 30380, now seen corresponding path program 1 times [2019-01-18 17:39:17,722 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:17,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:17,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:17,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:17,724 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:17,908 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 17:39:17,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:17,909 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:17,910 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 17:39:17,911 INFO L207 CegarAbsIntRunner]: [0], [18], [31] [2019-01-18 17:39:17,945 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:17,945 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:18,022 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:18,024 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 3. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:39:18,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:18,031 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:18,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:18,031 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 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 17:39:18,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:18,052 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:18,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:18,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:18,339 WARN L181 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2019-01-18 17:39:18,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,402 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 26 treesize of output 38 [2019-01-18 17:39:18,424 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 34 treesize of output 29 [2019-01-18 17:39:18,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,440 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 25 treesize of output 39 [2019-01-18 17:39:18,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,490 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 27 treesize of output 53 [2019-01-18 17:39:18,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,586 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:39:18,587 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:18,594 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:18,597 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:18,606 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:18,612 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:18,699 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-18 17:39:18,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 17:39:18,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,736 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 17:39:18,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,751 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 17:39:18,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,766 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 17:39:18,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,797 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 17:39:18,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,825 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 17:39:18,827 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:19,332 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:19,382 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:19,411 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:19,435 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:19,458 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:19,474 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:19,507 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 17:39:19,507 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:71, output treesize:54 [2019-01-18 17:39:19,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,588 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 17:39:19,589 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:19,912 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 17:39:19,912 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-18 17:39:21,106 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 17:39:21,106 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:21,129 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 17:39:21,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:21,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 17:39:21,149 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:21,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 17:39:21,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 17:39:21,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:39:21,150 INFO L87 Difference]: Start difference. First operand 17 states and 30 transitions. Second operand 6 states. [2019-01-18 17:39:41,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:41,182 INFO L93 Difference]: Finished difference Result 54 states and 79 transitions. [2019-01-18 17:39:41,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 17:39:41,184 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-18 17:39:41,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:41,185 INFO L225 Difference]: With dead ends: 54 [2019-01-18 17:39:41,185 INFO L226 Difference]: Without dead ends: 52 [2019-01-18 17:39:41,186 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 17:39:41,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-01-18 17:39:41,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 20. [2019-01-18 17:39:41,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-01-18 17:39:41,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 41 transitions. [2019-01-18 17:39:41,192 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 41 transitions. Word has length 3 [2019-01-18 17:39:41,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:41,193 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 41 transitions. [2019-01-18 17:39:41,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 17:39:41,193 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 41 transitions. [2019-01-18 17:39:41,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 17:39:41,193 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:41,194 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 17:39:41,194 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:41,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:41,194 INFO L82 PathProgramCache]: Analyzing trace with hash 30008, now seen corresponding path program 1 times [2019-01-18 17:39:41,195 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:41,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:41,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:41,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:41,196 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:41,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:41,256 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 17:39:41,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:41,256 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:41,257 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 17:39:41,257 INFO L207 CegarAbsIntRunner]: [0], [6], [31] [2019-01-18 17:39:41,258 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:41,258 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:41,269 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:41,270 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 3. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:39:41,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:41,270 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:41,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:41,271 INFO 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 17:39:41,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:41,280 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:41,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:41,390 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-18 17:39:41,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,398 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 17:39:41,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,459 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 17:39:41,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,487 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 17:39:41,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,506 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 17:39:41,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,604 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 17:39:41,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,646 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 17:39:41,647 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:41,724 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:41,766 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:41,798 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:41,821 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:41,840 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:41,857 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:41,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,932 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 26 treesize of output 38 [2019-01-18 17:39:41,953 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 34 treesize of output 29 [2019-01-18 17:39:41,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,998 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 25 treesize of output 39 [2019-01-18 17:39:42,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,025 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 27 treesize of output 53 [2019-01-18 17:39:42,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,066 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:39:42,067 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:42,070 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:42,074 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:42,076 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:42,077 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:42,107 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 17:39:42,108 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 8 variables, input treesize:71, output treesize:54 [2019-01-18 17:39:42,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,218 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 17:39:42,219 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:42,311 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 17:39:42,311 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-18 17:39:42,327 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 17:39:42,327 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:42,364 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 17:39:42,384 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-18 17:39:42,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 6 [2019-01-18 17:39:42,384 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 17:39:42,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-18 17:39:42,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-18 17:39:42,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:39:42,385 INFO L87 Difference]: Start difference. First operand 20 states and 41 transitions. Second operand 4 states. [2019-01-18 17:39:42,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:42,468 INFO L93 Difference]: Finished difference Result 25 states and 67 transitions. [2019-01-18 17:39:42,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-18 17:39:42,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-18 17:39:42,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:42,470 INFO L225 Difference]: With dead ends: 25 [2019-01-18 17:39:42,470 INFO L226 Difference]: Without dead ends: 24 [2019-01-18 17:39:42,471 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:39:42,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-01-18 17:39:42,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-01-18 17:39:42,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-01-18 17:39:42,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 66 transitions. [2019-01-18 17:39:42,477 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 66 transitions. Word has length 3 [2019-01-18 17:39:42,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:42,477 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 66 transitions. [2019-01-18 17:39:42,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-18 17:39:42,477 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 66 transitions. [2019-01-18 17:39:42,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 17:39:42,478 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:42,478 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 17:39:42,478 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:42,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:42,479 INFO L82 PathProgramCache]: Analyzing trace with hash 30132, now seen corresponding path program 1 times [2019-01-18 17:39:42,479 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:42,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:42,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:42,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:42,480 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:42,596 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 17:39:42,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:42,597 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:42,597 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 17:39:42,597 INFO L207 CegarAbsIntRunner]: [0], [10], [31] [2019-01-18 17:39:42,599 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:42,599 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:42,608 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:42,609 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 3. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:39:42,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:42,609 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:42,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:42,609 INFO 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 17:39:42,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:42,621 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:42,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:42,753 WARN L181 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2019-01-18 17:39:42,776 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-18 17:39:42,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,794 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 17:39:42,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,863 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 17:39:42,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,911 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 17:39:42,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:42,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,012 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 17:39:43,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,030 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 17:39:43,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,058 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 17:39:43,060 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,230 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,285 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,318 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,340 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,359 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,392 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,446 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 37 treesize of output 46 [2019-01-18 17:39:43,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,480 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 33 treesize of output 48 [2019-01-18 17:39:43,484 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 45 [2019-01-18 17:39:43,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,494 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2019-01-18 17:39:43,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,568 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:39:43,569 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,571 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,574 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,576 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,579 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,607 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 17:39:43,607 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:82, output treesize:54 [2019-01-18 17:39:43,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,690 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 17:39:43,692 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,946 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 17:39:43,946 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-18 17:39:45,141 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 17:39:45,141 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:45,154 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 17:39:45,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:45,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 17:39:45,175 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:45,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 17:39:45,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 17:39:45,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:39:45,176 INFO L87 Difference]: Start difference. First operand 23 states and 66 transitions. Second operand 6 states. [2019-01-18 17:40:06,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:06,144 INFO L93 Difference]: Finished difference Result 57 states and 111 transitions. [2019-01-18 17:40:06,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 17:40:06,145 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-18 17:40:06,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:06,146 INFO L225 Difference]: With dead ends: 57 [2019-01-18 17:40:06,146 INFO L226 Difference]: Without dead ends: 56 [2019-01-18 17:40:06,146 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 17:40:06,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-01-18 17:40:06,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 25. [2019-01-18 17:40:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-01-18 17:40:06,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 82 transitions. [2019-01-18 17:40:06,153 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 82 transitions. Word has length 3 [2019-01-18 17:40:06,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:06,153 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 82 transitions. [2019-01-18 17:40:06,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 17:40:06,154 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 82 transitions. [2019-01-18 17:40:06,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 17:40:06,154 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:06,154 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 17:40:06,154 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:06,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:06,155 INFO L82 PathProgramCache]: Analyzing trace with hash 30628, now seen corresponding path program 1 times [2019-01-18 17:40:06,155 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:06,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:06,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:06,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:06,156 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:06,243 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 17:40:06,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:06,243 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:06,243 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 17:40:06,244 INFO L207 CegarAbsIntRunner]: [0], [26], [31] [2019-01-18 17:40:06,245 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:06,245 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:06,255 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:06,255 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 3. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:40:06,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:06,255 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:06,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:06,256 INFO 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 17:40:06,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:06,264 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:06,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:06,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:06,362 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-18 17:40:06,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,367 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 17:40:06,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,375 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 17:40:06,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,382 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 17:40:06,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,403 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 17:40:06,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,417 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-18 17:40:06,424 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 17:40:06,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,432 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 17:40:06,433 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,496 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,533 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,558 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,582 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,600 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,615 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,663 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 37 treesize of output 46 [2019-01-18 17:40:06,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,690 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 48 [2019-01-18 17:40:06,707 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 45 [2019-01-18 17:40:06,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,713 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2019-01-18 17:40:06,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,767 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:40:06,768 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,778 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,780 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,781 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,783 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,811 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 17:40:06,811 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:82, output treesize:54 [2019-01-18 17:40:06,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,836 INFO L701 Elim1Store]: detected not equals via solver [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 17:40:06,842 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 L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,860 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 17:40:06,861 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,946 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 17:40:06,946 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-18 17:40:08,122 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 17:40:08,123 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:08,132 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 17:40:08,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:08,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 17:40:08,151 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:08,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 17:40:08,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 17:40:08,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:40:08,152 INFO L87 Difference]: Start difference. First operand 25 states and 82 transitions. Second operand 6 states. [2019-01-18 17:40:26,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:26,714 INFO L93 Difference]: Finished difference Result 59 states and 127 transitions. [2019-01-18 17:40:26,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 17:40:26,715 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-18 17:40:26,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:26,716 INFO L225 Difference]: With dead ends: 59 [2019-01-18 17:40:26,716 INFO L226 Difference]: Without dead ends: 57 [2019-01-18 17:40:26,717 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 17:40:26,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-01-18 17:40:26,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 29. [2019-01-18 17:40:26,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-01-18 17:40:26,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 101 transitions. [2019-01-18 17:40:26,724 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 101 transitions. Word has length 3 [2019-01-18 17:40:26,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:26,724 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 101 transitions. [2019-01-18 17:40:26,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 17:40:26,724 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 101 transitions. [2019-01-18 17:40:26,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:40:26,725 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:26,725 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:40:26,725 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:26,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:26,726 INFO L82 PathProgramCache]: Analyzing trace with hash 955362, now seen corresponding path program 1 times [2019-01-18 17:40:26,726 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:26,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:26,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:26,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:26,727 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:26,783 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 17:40:26,784 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-18 17:40:26,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-18 17:40:26,784 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 17:40:26,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-18 17:40:26,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-18 17:40:26,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-18 17:40:26,785 INFO L87 Difference]: Start difference. First operand 29 states and 101 transitions. Second operand 3 states. [2019-01-18 17:40:26,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:26,906 INFO L93 Difference]: Finished difference Result 33 states and 102 transitions. [2019-01-18 17:40:26,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-18 17:40:26,907 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-01-18 17:40:26,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:26,907 INFO L225 Difference]: With dead ends: 33 [2019-01-18 17:40:26,908 INFO L226 Difference]: Without dead ends: 32 [2019-01-18 17:40:26,908 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 17:40:26,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-01-18 17:40:26,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2019-01-18 17:40:26,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-01-18 17:40:26,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 100 transitions. [2019-01-18 17:40:26,918 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 100 transitions. Word has length 4 [2019-01-18 17:40:26,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:26,918 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 100 transitions. [2019-01-18 17:40:26,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-18 17:40:26,918 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 100 transitions. [2019-01-18 17:40:26,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:40:26,919 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:26,919 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:40:26,919 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:26,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:26,920 INFO L82 PathProgramCache]: Analyzing trace with hash 941844, now seen corresponding path program 1 times [2019-01-18 17:40:26,920 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:26,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:26,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:26,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:26,921 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:26,989 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 17:40:26,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:26,989 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:26,989 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:40:26,990 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [33] [2019-01-18 17:40:26,991 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:26,991 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:27,003 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:27,003 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:40:27,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:27,004 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:27,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:27,004 INFO 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 17:40:27,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:27,013 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:27,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:27,026 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 23 [2019-01-18 17:40:27,031 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2019-01-18 17:40:27,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,044 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 31 [2019-01-18 17:40:27,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,059 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 41 [2019-01-18 17:40:27,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,099 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2019-01-18 17:40:27,099 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:27,113 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:27,118 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:27,121 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:27,123 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:27,140 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 17:40:27,146 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 29 [2019-01-18 17:40:27,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,157 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 29 treesize of output 35 [2019-01-18 17:40:27,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,166 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 31 treesize of output 45 [2019-01-18 17:40:27,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,185 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2019-01-18 17:40:27,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,204 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 35 treesize of output 81 [2019-01-18 17:40:27,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,248 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 37 treesize of output 100 [2019-01-18 17:40:27,249 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:27,303 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:27,330 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:27,351 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:27,369 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:27,385 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:27,400 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:27,432 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 17:40:27,432 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:60, output treesize:55 [2019-01-18 17:40:27,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,516 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 46 treesize of output 104 [2019-01-18 17:40:27,518 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:40:27,729 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 11 dim-0 vars, and 2 xjuncts. [2019-01-18 17:40:27,729 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:65, output treesize:104 [2019-01-18 17:40:29,259 WARN L181 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2019-01-18 17:40:29,264 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 17:40:29,264 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:29,316 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 17:40:29,336 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-18 17:40:29,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 6 [2019-01-18 17:40:29,337 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 17:40:29,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-18 17:40:29,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-18 17:40:29,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:40:29,338 INFO L87 Difference]: Start difference. First operand 29 states and 100 transitions. Second operand 4 states. [2019-01-18 17:40:29,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:29,391 INFO L93 Difference]: Finished difference Result 33 states and 111 transitions. [2019-01-18 17:40:29,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-18 17:40:29,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-18 17:40:29,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:29,393 INFO L225 Difference]: With dead ends: 33 [2019-01-18 17:40:29,393 INFO L226 Difference]: Without dead ends: 32 [2019-01-18 17:40:29,393 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:40:29,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-01-18 17:40:29,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-01-18 17:40:29,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-01-18 17:40:29,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 110 transitions. [2019-01-18 17:40:29,400 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 110 transitions. Word has length 4 [2019-01-18 17:40:29,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:29,400 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 110 transitions. [2019-01-18 17:40:29,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-18 17:40:29,401 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 110 transitions. [2019-01-18 17:40:29,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:40:29,401 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:29,401 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:40:29,402 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:29,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:29,402 INFO L82 PathProgramCache]: Analyzing trace with hash 941532, now seen corresponding path program 1 times [2019-01-18 17:40:29,402 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:29,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:29,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:29,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:29,403 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:29,516 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 17:40:29,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:29,516 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:29,516 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:40:29,517 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [31] [2019-01-18 17:40:29,518 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:29,518 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:29,524 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:29,525 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:40:29,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:29,525 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:29,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:29,525 INFO 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 17:40:29,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:29,536 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:29,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:29,607 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-18 17:40:29,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,614 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 17:40:29,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,621 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-18 17:40:29,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,635 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 17:40:29,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,646 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 17:40:29,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,660 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 17:40:29,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 17:40:29,694 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:29,753 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:29,787 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:29,894 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:29,913 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:29,931 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:29,948 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:29,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,988 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 26 treesize of output 38 [2019-01-18 17:40:29,992 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 34 treesize of output 29 [2019-01-18 17:40:29,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,997 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 25 treesize of output 39 [2019-01-18 17:40:30,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,004 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 53 [2019-01-18 17:40:30,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,038 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:40:30,039 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:30,041 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:30,043 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:30,044 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:30,046 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:30,075 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 17:40:30,075 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:71, output treesize:54 [2019-01-18 17:40:30,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,129 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 17:40:30,130 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:30,213 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 17:40:30,213 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-18 17:40:30,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,354 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 134 [2019-01-18 17:40:30,355 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:30,444 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 17:40:30,444 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-18 17:40:32,733 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 17:40:32,733 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:32,758 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 17:40:32,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:32,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:40:32,777 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:32,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:40:32,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:40:32,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:40:32,778 INFO L87 Difference]: Start difference. First operand 31 states and 110 transitions. Second operand 8 states. [2019-01-18 17:41:07,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:07,544 INFO L93 Difference]: Finished difference Result 74 states and 179 transitions. [2019-01-18 17:41:07,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:41:07,546 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:41:07,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:07,548 INFO L225 Difference]: With dead ends: 74 [2019-01-18 17:41:07,548 INFO L226 Difference]: Without dead ends: 72 [2019-01-18 17:41:07,548 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:41:07,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-01-18 17:41:07,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 38. [2019-01-18 17:41:07,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-01-18 17:41:07,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 139 transitions. [2019-01-18 17:41:07,556 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 139 transitions. Word has length 4 [2019-01-18 17:41:07,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:07,556 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 139 transitions. [2019-01-18 17:41:07,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:41:07,557 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 139 transitions. [2019-01-18 17:41:07,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:41:07,557 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:07,557 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:41:07,558 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:07,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:07,558 INFO L82 PathProgramCache]: Analyzing trace with hash 941160, now seen corresponding path program 1 times [2019-01-18 17:41:07,558 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:07,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:07,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:07,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:07,559 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:07,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:07,686 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 17:41:07,687 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:07,687 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:07,687 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:41:07,687 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [31] [2019-01-18 17:41:07,688 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:07,688 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:07,695 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:07,696 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:41:07,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:07,696 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:07,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:07,696 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:41:07,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:07,706 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:07,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:07,773 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-18 17:41:07,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,779 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 17:41:07,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,788 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 17:41:07,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,802 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 17:41:07,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,811 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 17:41:07,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,822 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 17:41:07,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,835 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 17:41:07,836 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:07,895 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:07,928 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:07,957 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:07,977 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:07,996 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,012 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,063 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 40 treesize of output 49 [2019-01-18 17:41:08,066 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 45 treesize of output 37 [2019-01-18 17:41:08,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,086 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 64 [2019-01-18 17:41:08,094 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 40 treesize of output 59 [2019-01-18 17:41:08,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:41:08,147 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,149 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,150 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,152 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,154 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,182 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 17:41:08,182 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:85, output treesize:54 [2019-01-18 17:41:08,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,241 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 17:41:08,242 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,327 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 17:41:08,328 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-18 17:41:08,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,550 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:08,552 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 48 treesize of output 135 [2019-01-18 17:41:08,553 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,644 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 17:41:08,644 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:54 [2019-01-18 17:41:10,932 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 17:41:10,932 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:10,955 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 17:41:10,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:10,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:41:10,974 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:10,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:41:10,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:41:10,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:41:10,975 INFO L87 Difference]: Start difference. First operand 38 states and 139 transitions. Second operand 8 states. [2019-01-18 17:41:45,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:45,406 INFO L93 Difference]: Finished difference Result 71 states and 181 transitions. [2019-01-18 17:41:45,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:41:45,406 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:41:45,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:45,408 INFO L225 Difference]: With dead ends: 71 [2019-01-18 17:41:45,408 INFO L226 Difference]: Without dead ends: 70 [2019-01-18 17:41:45,409 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:41:45,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-01-18 17:41:45,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 38. [2019-01-18 17:41:45,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-01-18 17:41:45,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 139 transitions. [2019-01-18 17:41:45,423 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 139 transitions. Word has length 4 [2019-01-18 17:41:45,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:45,424 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 139 transitions. [2019-01-18 17:41:45,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:41:45,424 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 139 transitions. [2019-01-18 17:41:45,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:41:45,425 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:45,425 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:41:45,425 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:45,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:45,425 INFO L82 PathProgramCache]: Analyzing trace with hash 941656, now seen corresponding path program 1 times [2019-01-18 17:41:45,425 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:45,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:45,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:45,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:45,428 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:45,539 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 17:41:45,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:45,540 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:45,540 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:41:45,540 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [31] [2019-01-18 17:41:45,541 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:45,542 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:45,548 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:45,548 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:41:45,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:45,549 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:45,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:45,549 INFO 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 17:41:45,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:45,558 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:45,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:45,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:45,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:45,655 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 37 treesize of output 46 [2019-01-18 17:41:45,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:45,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:45,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:45,697 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 48 [2019-01-18 17:41:45,701 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 36 treesize of output 45 [2019-01-18 17:41:45,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:45,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:45,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:45,707 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2019-01-18 17:41:45,917 WARN L181 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2019-01-18 17:41:45,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:45,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:45,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:45,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:45,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:45,928 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:41:45,928 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:45,930 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:45,934 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:45,935 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:45,937 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:45,956 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-18 17:41:45,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:45,960 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 17:41:45,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:45,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:45,965 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 17:41:45,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:45,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:45,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:45,975 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 17:41:45,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:45,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:45,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:45,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:45,986 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 17:41:46,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,060 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 17:41:46,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,089 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 17:41:46,090 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:46,154 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:46,184 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:46,208 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:46,226 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:46,242 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:46,254 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:46,279 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 17:41:46,280 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:82, output treesize:54 [2019-01-18 17:41:46,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,340 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 17:41:46,340 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:46,423 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 17:41:46,423 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-18 17:41:46,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,495 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:46,496 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 48 treesize of output 135 [2019-01-18 17:41:46,497 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:46,583 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 17:41:46,583 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:54 [2019-01-18 17:41:48,840 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 17:41:48,840 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:48,865 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 17:41:48,884 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:48,884 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:41:48,884 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:48,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:41:48,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:41:48,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:41:48,885 INFO L87 Difference]: Start difference. First operand 38 states and 139 transitions. Second operand 8 states. [2019-01-18 17:42:22,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:42:22,612 INFO L93 Difference]: Finished difference Result 71 states and 181 transitions. [2019-01-18 17:42:22,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:42:22,612 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:42:22,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:42:22,613 INFO L225 Difference]: With dead ends: 71 [2019-01-18 17:42:22,613 INFO L226 Difference]: Without dead ends: 69 [2019-01-18 17:42:22,614 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:42:22,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-01-18 17:42:22,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 37. [2019-01-18 17:42:22,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-01-18 17:42:22,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 138 transitions. [2019-01-18 17:42:22,624 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 138 transitions. Word has length 4 [2019-01-18 17:42:22,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:42:22,624 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 138 transitions. [2019-01-18 17:42:22,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:42:22,624 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 138 transitions. [2019-01-18 17:42:22,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:42:22,625 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:42:22,625 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:42:22,625 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:42:22,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:42:22,626 INFO L82 PathProgramCache]: Analyzing trace with hash 941718, now seen corresponding path program 1 times [2019-01-18 17:42:22,626 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:42:22,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:42:22,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:42:22,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:42:22,627 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:42:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:42:22,750 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 17:42:22,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:42:22,750 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:42:22,750 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:42:22,751 INFO L207 CegarAbsIntRunner]: [0], [18], [28], [31] [2019-01-18 17:42:22,752 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:42:22,752 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:42:22,757 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:42:22,758 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:42:22,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:42:22,758 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:42:22,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:42:22,758 INFO 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) [2019-01-18 17:42:22,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:42:22,770 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:42:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:42:22,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:42:22,905 WARN L181 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2019-01-18 17:42:22,908 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-18 17:42:22,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:22,914 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 17:42:22,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:22,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:22,919 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 17:42:22,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:22,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:22,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:22,926 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 17:42:22,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:22,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:22,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:22,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:22,934 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 17:42:22,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,084 INFO L303 Elim1Store]: Index analysis took 147 ms [2019-01-18 17:42:23,085 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 17:42:23,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,227 INFO L303 Elim1Store]: Index analysis took 138 ms [2019-01-18 17:42:23,228 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 17:42:23,229 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:23,482 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:23,514 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:23,540 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:23,560 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:23,578 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:23,594 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:23,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,637 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 26 treesize of output 38 [2019-01-18 17:42:23,649 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 34 treesize of output 29 [2019-01-18 17:42:23,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,692 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 25 treesize of output 39 [2019-01-18 17:42:23,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,697 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 53 [2019-01-18 17:42:23,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,727 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:42:23,728 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:23,731 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:23,732 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:23,738 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:23,741 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:23,767 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 17:42:23,767 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:71, output treesize:54 [2019-01-18 17:42:23,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:23,865 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 17:42:23,867 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:23,945 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 17:42:23,945 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-18 17:42:24,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:24,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:24,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:24,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:24,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:24,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:24,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:24,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:24,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:24,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:24,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:24,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:24,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:24,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:24,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:24,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:24,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:24,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:24,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:24,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:24,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:24,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:24,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:24,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:24,160 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 17:42:24,161 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:24,282 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 17:42:24,283 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-18 17:42:26,770 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 17:42:26,770 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:42:26,792 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 17:42:26,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:42:26,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:42:26,811 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:42:26,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:42:26,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:42:26,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:42:26,812 INFO L87 Difference]: Start difference. First operand 37 states and 138 transitions. Second operand 8 states. [2019-01-18 17:42:59,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:42:59,884 INFO L93 Difference]: Finished difference Result 74 states and 200 transitions. [2019-01-18 17:42:59,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:42:59,884 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:42:59,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:42:59,885 INFO L225 Difference]: With dead ends: 74 [2019-01-18 17:42:59,885 INFO L226 Difference]: Without dead ends: 63 [2019-01-18 17:42:59,886 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:42:59,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-01-18 17:42:59,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 35. [2019-01-18 17:42:59,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-01-18 17:42:59,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 155 transitions. [2019-01-18 17:42:59,895 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 155 transitions. Word has length 4 [2019-01-18 17:42:59,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:42:59,895 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 155 transitions. [2019-01-18 17:42:59,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:42:59,896 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 155 transitions. [2019-01-18 17:42:59,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:42:59,896 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:42:59,896 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:42:59,897 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:42:59,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:42:59,897 INFO L82 PathProgramCache]: Analyzing trace with hash 941284, now seen corresponding path program 1 times [2019-01-18 17:42:59,897 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:42:59,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:42:59,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:42:59,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:42:59,898 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:42:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:42:59,988 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 17:42:59,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:42:59,988 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:42:59,988 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:42:59,989 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [31] [2019-01-18 17:42:59,990 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:42:59,990 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:42:59,995 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:42:59,995 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:42:59,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:42:59,996 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:42:59,996 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:42:59,996 INFO 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 17:43:00,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:43:00,009 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:43:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:43:00,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:43:00,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,083 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 26 treesize of output 38 [2019-01-18 17:43:00,086 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 34 treesize of output 29 [2019-01-18 17:43:00,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,091 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 25 treesize of output 39 [2019-01-18 17:43:00,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,097 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 27 treesize of output 53 [2019-01-18 17:43:00,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,128 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:43:00,128 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:43:00,131 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:00,133 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:00,135 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:00,137 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:00,154 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-18 17:43:00,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,158 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 17:43:00,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,163 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-18 17:43:00,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,176 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:43:00,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,215 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 17:43:00,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,225 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 17:43:00,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,234 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 17:43:00,235 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:43:00,296 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:00,327 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:00,351 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:00,370 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:00,384 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:00,397 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:00,425 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 17:43:00,426 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:71, output treesize:54 [2019-01-18 17:43:00,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,477 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 17:43:00,478 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:43:00,558 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 17:43:00,559 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-18 17:43:00,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:00,633 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 17:43:00,634 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:43:00,748 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 17:43:00,748 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-18 17:43:03,026 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 17:43:03,026 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:43:03,111 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 17:43:03,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:43:03,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:43:03,131 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:43:03,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:43:03,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:43:03,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:43:03,132 INFO L87 Difference]: Start difference. First operand 35 states and 155 transitions. Second operand 8 states. [2019-01-18 17:43:15,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:43:15,146 INFO L93 Difference]: Finished difference Result 67 states and 213 transitions. [2019-01-18 17:43:15,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:43:15,147 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:43:15,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:43:15,148 INFO L225 Difference]: With dead ends: 67 [2019-01-18 17:43:15,148 INFO L226 Difference]: Without dead ends: 65 [2019-01-18 17:43:15,149 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:43:15,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-01-18 17:43:15,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2019-01-18 17:43:15,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-01-18 17:43:15,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 178 transitions. [2019-01-18 17:43:15,159 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 178 transitions. Word has length 4 [2019-01-18 17:43:15,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:43:15,160 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 178 transitions. [2019-01-18 17:43:15,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:43:15,160 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 178 transitions. [2019-01-18 17:43:15,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:43:15,160 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:43:15,161 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:43:15,161 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:43:15,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:43:15,161 INFO L82 PathProgramCache]: Analyzing trace with hash 930312, now seen corresponding path program 1 times [2019-01-18 17:43:15,161 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:43:15,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:43:15,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:43:15,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:43:15,162 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:43:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:43:15,219 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 17:43:15,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:43:15,220 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:43:15,220 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:43:15,220 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [33] [2019-01-18 17:43:15,221 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:43:15,222 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:43:15,227 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:43:15,227 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:43:15,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:43:15,228 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:43:15,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:43:15,228 INFO 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 17:43:15,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:43:15,237 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:43:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:43:15,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:43:15,291 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 17:43:15,294 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 17:43:15,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,300 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 29 treesize of output 39 [2019-01-18 17:43:15,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,307 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 31 treesize of output 49 [2019-01-18 17:43:15,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,318 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 33 treesize of output 63 [2019-01-18 17:43:15,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,336 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 85 [2019-01-18 17:43:15,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,350 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 104 [2019-01-18 17:43:15,351 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:43:15,414 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:15,442 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:15,466 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:15,485 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:15,501 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:15,517 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:15,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,560 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 26 treesize of output 38 [2019-01-18 17:43:15,563 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 34 treesize of output 29 [2019-01-18 17:43:15,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,567 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 25 treesize of output 35 [2019-01-18 17:43:15,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,573 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 27 treesize of output 45 [2019-01-18 17:43:15,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,604 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 33 [2019-01-18 17:43:15,604 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-18 17:43:15,617 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:15,680 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:15,684 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:15,689 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:15,719 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 17:43:15,719 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:68, output treesize:59 [2019-01-18 17:43:15,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:15,804 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 18 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 46 treesize of output 120 [2019-01-18 17:43:15,809 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2019-01-18 17:43:16,171 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 26 dim-0 vars, and 5 xjuncts. [2019-01-18 17:43:16,172 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:69, output treesize:236 [2019-01-18 17:43:21,567 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-01-18 17:43:21,768 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:43:21,769 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 17:43:21,773 INFO L168 Benchmark]: Toolchain (without parser) took 245521.37 ms. Allocated memory was 133.7 MB in the beginning and 309.3 MB in the end (delta: 175.6 MB). Free memory was 108.9 MB in the beginning and 194.9 MB in the end (delta: -86.0 MB). Peak memory consumption was 89.7 MB. Max. memory is 7.1 GB. [2019-01-18 17:43:21,774 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 133.7 MB. Free memory is still 110.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-18 17:43:21,774 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.25 ms. Allocated memory is still 133.7 MB. Free memory was 108.7 MB in the beginning and 106.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2019-01-18 17:43:21,774 INFO L168 Benchmark]: Boogie Preprocessor took 35.83 ms. Allocated memory is still 133.7 MB. Free memory was 106.4 MB in the beginning and 105.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-01-18 17:43:21,774 INFO L168 Benchmark]: RCFGBuilder took 429.94 ms. Allocated memory is still 133.7 MB. Free memory was 105.1 MB in the beginning and 92.7 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2019-01-18 17:43:21,775 INFO L168 Benchmark]: TraceAbstraction took 245000.00 ms. Allocated memory was 133.7 MB in the beginning and 309.3 MB in the end (delta: 175.6 MB). Free memory was 92.3 MB in the beginning and 194.9 MB in the end (delta: -102.6 MB). Peak memory consumption was 73.1 MB. Max. memory is 7.1 GB. [2019-01-18 17:43:21,776 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 0.13 ms. Allocated memory is still 133.7 MB. Free memory is still 110.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 51.25 ms. Allocated memory is still 133.7 MB. Free memory was 108.7 MB in the beginning and 106.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.83 ms. Allocated memory is still 133.7 MB. Free memory was 106.4 MB in the beginning and 105.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 429.94 ms. Allocated memory is still 133.7 MB. Free memory was 105.1 MB in the beginning and 92.7 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 245000.00 ms. Allocated memory was 133.7 MB in the beginning and 309.3 MB in the end (delta: 175.6 MB). Free memory was 92.3 MB in the beginning and 194.9 MB in the end (delta: -102.6 MB). Peak memory consumption was 73.1 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...