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 0.1.24-0ed9222-m [2019-01-11 14:23:07,413 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-11 14:23:07,415 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-11 14:23:07,427 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-01-11 14:23:07,463 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 [2019-01-11 14:23:07,476 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-11 14:23:07,476 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-11 14:23:07,477 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-11 14:23:07,478 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-11 14:23:07,478 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-11 14:23:07,478 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-11 14:23:07,478 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-11 14:23:07,478 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-11 14:23:07,479 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-11 14:23:07,479 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-11 14:23:07,479 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-11 14:23:07,479 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-11 14:23:07,479 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-11 14:23:07,480 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-11 14:23:07,480 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-11 14:23:07,481 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-11 14:23:07,481 INFO L133 SettingsManager]: * Use SBE=true [2019-01-11 14:23:07,481 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-11 14:23:07,481 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-11 14:23:07,482 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-11 14:23:07,482 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-11 14:23:07,482 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-11 14:23:07,482 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-11 14:23:07,482 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-11 14:23:07,483 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-11 14:23:07,483 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-11 14:23:07,483 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-11 14:23:07,483 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-11 14:23:07,484 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-11 14:23:07,484 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-11 14:23:07,484 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-11 14:23:07,484 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-11 14:23:07,484 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-11 14:23:07,485 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-11 14:23:07,485 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-11 14:23:07,485 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-11 14:23:07,485 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-11 14:23:07,485 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in [2019-01-11 14:23:07,485 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-11 14:23:07,486 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-11 14:23:07,515 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-11 14:23:07,528 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-11 14:23:07,531 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-11 14:23:07,533 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-11 14:23:07,533 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-11 14:23:07,534 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-limited.bpl [2019-01-11 14:23:07,535 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-limited.bpl' [2019-01-11 14:23:07,576 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-11 14:23:07,578 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-11 14:23:07,579 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-11 14:23:07,579 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-11 14:23:07,579 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-11 14:23:07,596 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 11.01 02:23:07" (1/1) ... [2019-01-11 14:23:07,609 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 11.01 02:23:07" (1/1) ... [2019-01-11 14:23:07,643 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-11 14:23:07,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-11 14:23:07,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-11 14:23:07,645 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-11 14:23:07,657 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 11.01 02:23:07" (1/1) ... [2019-01-11 14:23:07,658 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 11.01 02:23:07" (1/1) ... [2019-01-11 14:23:07,660 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 11.01 02:23:07" (1/1) ... [2019-01-11 14:23:07,661 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 11.01 02:23:07" (1/1) ... [2019-01-11 14:23:07,664 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 11.01 02:23:07" (1/1) ... [2019-01-11 14:23:07,671 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 11.01 02:23:07" (1/1) ... [2019-01-11 14:23:07,673 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 11.01 02:23:07" (1/1) ... [2019-01-11 14:23:07,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-11 14:23:07,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-11 14:23:07,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-11 14:23:07,684 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-11 14:23:07,688 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 11.01 02:23:07" (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:8192 -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:8192 -smt2 -in -t:2000 [2019-01-11 14:23:07,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-11 14:23:07,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-11 14:23:08,123 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-11 14:23:08,124 INFO L286 CfgBuilder]: Removed 17 assue(true) statements. [2019-01-11 14:23:08,125 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:23:08 BoogieIcfgContainer [2019-01-11 14:23:08,125 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-11 14:23:08,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-11 14:23:08,127 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-11 14:23:08,130 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-11 14:23:08,130 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 11.01 02:23:07" (1/2) ... [2019-01-11 14:23:08,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@245351c4 and model type speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:23:08, skipping insertion in model container [2019-01-11 14:23:08,132 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 11.01 02:23:08" (2/2) ... [2019-01-11 14:23:08,133 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-7-limited.bpl [2019-01-11 14:23:08,143 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-11 14:23:08,153 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-01-11 14:23:08,170 INFO L257 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-01-11 14:23:08,209 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-11 14:23:08,210 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-11 14:23:08,210 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-11 14:23:08,210 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-11 14:23:08,210 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-11 14:23:08,210 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-11 14:23:08,211 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-11 14:23:08,211 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-11 14:23:08,229 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-01-11 14:23:08,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-11 14:23:08,240 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:23:08,241 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-11 14:23:08,245 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:23:08,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:08,254 INFO L82 PathProgramCache]: Analyzing trace with hash 992, now seen corresponding path program 1 times [2019-01-11 14:23:08,256 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:23:08,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:08,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:08,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:08,308 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:23:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:08,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:08,451 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-11 14:23:08,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-11 14:23:08,451 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 14:23:08,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-11 14:23:08,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-11 14:23:08,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 14:23:08,475 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-01-11 14:23:08,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:23:08,704 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2019-01-11 14:23:08,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 14:23:08,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-11 14:23:08,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:23:08,721 INFO L225 Difference]: With dead ends: 33 [2019-01-11 14:23:08,722 INFO L226 Difference]: Without dead ends: 28 [2019-01-11 14:23:08,725 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 [2019-01-11 14:23:08,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-01-11 14:23:08,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 16. [2019-01-11 14:23:08,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-01-11 14:23:08,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 29 transitions. [2019-01-11 14:23:08,760 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 29 transitions. Word has length 2 [2019-01-11 14:23:08,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:23:08,762 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 29 transitions. [2019-01-11 14:23:08,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-11 14:23:08,762 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 29 transitions. [2019-01-11 14:23:08,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 14:23:08,763 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:23:08,763 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 14:23:08,764 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:23:08,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:08,764 INFO L82 PathProgramCache]: Analyzing trace with hash 30816, now seen corresponding path program 1 times [2019-01-11 14:23:08,764 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:23:08,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:08,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:08,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:08,766 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:23:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:08,830 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-11 14:23:08,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-11 14:23:08,830 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 14:23:08,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-11 14:23:08,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-11 14:23:08,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 14:23:08,833 INFO L87 Difference]: Start difference. First operand 16 states and 29 transitions. Second operand 3 states. [2019-01-11 14:23:09,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:23:09,106 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2019-01-11 14:23:09,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 14:23:09,107 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-11 14:23:09,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:23:09,108 INFO L225 Difference]: With dead ends: 28 [2019-01-11 14:23:09,108 INFO L226 Difference]: Without dead ends: 27 [2019-01-11 14:23:09,109 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 [2019-01-11 14:23:09,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-01-11 14:23:09,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2019-01-11 14:23:09,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-01-11 14:23:09,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 30 transitions. [2019-01-11 14:23:09,114 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 30 transitions. Word has length 3 [2019-01-11 14:23:09,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:23:09,114 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 30 transitions. [2019-01-11 14:23:09,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-11 14:23:09,114 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 30 transitions. [2019-01-11 14:23:09,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 14:23:09,115 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:23:09,115 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 14:23:09,116 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:23:09,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:09,116 INFO L82 PathProgramCache]: Analyzing trace with hash 30380, now seen corresponding path program 1 times [2019-01-11 14:23:09,117 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:23:09,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:09,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:09,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:09,118 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:23:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:09,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:23:09,285 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:23:09,286 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 14:23:09,287 INFO L207 CegarAbsIntRunner]: [0], [18], [31] [2019-01-11 14:23:09,324 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:23:09,324 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:23:09,389 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:23:09,391 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. [2019-01-11 14:23:09,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:09,397 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:23:09,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:23:09,398 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-11 14:23:09,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:09,415 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:23:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:09,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:23:09,672 WARN L181 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2019-01-11 14:23:09,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:09,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:09,746 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 38 [2019-01-11 14:23:09,758 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 [2019-01-11 14:23:09,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:09,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:09,778 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 [2019-01-11 14:23:09,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:09,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:09,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:09,827 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 [2019-01-11 14:23:09,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:09,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:09,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:09,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:09,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:09,957 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 [2019-01-11 14:23:09,959 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:09,965 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:09,968 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:09,972 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:09,984 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:10,081 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 [2019-01-11 14:23:10,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:10,098 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 [2019-01-11 14:23:10,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:10,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:10,112 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 [2019-01-11 14:23:10,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:10,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:10,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:10,136 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 [2019-01-11 14:23:10,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:10,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:10,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:10,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:10,188 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 [2019-01-11 14:23:10,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:10,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:10,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:10,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:10,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:10,225 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 [2019-01-11 14:23:10,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:10,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:10,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:10,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:10,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:10,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:10,287 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 [2019-01-11 14:23:10,289 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:10,712 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:10,769 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:10,802 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:10,825 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:10,851 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:10,869 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:10,905 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. [2019-01-11 14:23:10,905 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:71, output treesize:54 [2019-01-11 14:23:11,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:11,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:11,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:11,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:11,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:11,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:11,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:11,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:11,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:11,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:11,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:11,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:11,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:11,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:11,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:11,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:11,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:11,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:11,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:11,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:11,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:11,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:11,073 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 [2019-01-11 14:23:11,074 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:11,421 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. [2019-01-11 14:23:11,422 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-11 14:23:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:12,609 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:23:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:12,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:23:12,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 14:23:12,661 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:23:12,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 14:23:12,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 14:23:12,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:23:12,663 INFO L87 Difference]: Start difference. First operand 17 states and 30 transitions. Second operand 6 states. [2019-01-11 14:23:32,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:23:32,736 INFO L93 Difference]: Finished difference Result 54 states and 79 transitions. [2019-01-11 14:23:32,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 14:23:32,737 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 14:23:32,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:23:32,738 INFO L225 Difference]: With dead ends: 54 [2019-01-11 14:23:32,738 INFO L226 Difference]: Without dead ends: 52 [2019-01-11 14:23:32,739 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 14:23:32,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-01-11 14:23:32,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 20. [2019-01-11 14:23:32,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-01-11 14:23:32,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 41 transitions. [2019-01-11 14:23:32,745 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 41 transitions. Word has length 3 [2019-01-11 14:23:32,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:23:32,746 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 41 transitions. [2019-01-11 14:23:32,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 14:23:32,746 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 41 transitions. [2019-01-11 14:23:32,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 14:23:32,746 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:23:32,746 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 14:23:32,747 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:23:32,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:32,747 INFO L82 PathProgramCache]: Analyzing trace with hash 30008, now seen corresponding path program 1 times [2019-01-11 14:23:32,747 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:23:32,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:32,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:32,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:32,749 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:23:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:32,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:32,815 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:23:32,815 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:23:32,816 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 14:23:32,816 INFO L207 CegarAbsIntRunner]: [0], [6], [31] [2019-01-11 14:23:32,817 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:23:32,817 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:23:32,828 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:23:32,828 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. [2019-01-11 14:23:32,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:32,829 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:23:32,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:23:32,829 INFO 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 [2019-01-11 14:23:32,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:32,840 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:23:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:32,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:23:32,950 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 [2019-01-11 14:23:32,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:32,954 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 [2019-01-11 14:23:32,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,007 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 [2019-01-11 14:23:33,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,037 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 [2019-01-11 14:23:33,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,124 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 [2019-01-11 14:23:33,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,175 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-01-11 14:23:33,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,281 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 [2019-01-11 14:23:33,282 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:33,373 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:33,432 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:33,472 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:33,500 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:33,532 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:33,587 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:33,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,662 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 [2019-01-11 14:23:33,672 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2019-01-11 14:23:33,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,680 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 [2019-01-11 14:23:33,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,715 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-01-11 14:23:33,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,760 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 [2019-01-11 14:23:33,761 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:33,764 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:33,766 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:33,769 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:33,771 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:33,801 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. [2019-01-11 14:23:33,802 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 8 variables, input treesize:71, output treesize:54 [2019-01-11 14:23:33,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,888 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 [2019-01-11 14:23:33,890 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:33,981 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. [2019-01-11 14:23:33,982 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-11 14:23:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:34,050 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:23:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:34,079 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-11 14:23:34,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 6 [2019-01-11 14:23:34,079 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 14:23:34,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-11 14:23:34,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-11 14:23:34,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:23:34,080 INFO L87 Difference]: Start difference. First operand 20 states and 41 transitions. Second operand 4 states. [2019-01-11 14:23:34,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:23:34,174 INFO L93 Difference]: Finished difference Result 25 states and 67 transitions. [2019-01-11 14:23:34,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-11 14:23:34,174 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-11 14:23:34,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:23:34,176 INFO L225 Difference]: With dead ends: 25 [2019-01-11 14:23:34,176 INFO L226 Difference]: Without dead ends: 24 [2019-01-11 14:23:34,177 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:23:34,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-01-11 14:23:34,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-01-11 14:23:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-01-11 14:23:34,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 66 transitions. [2019-01-11 14:23:34,183 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 66 transitions. Word has length 3 [2019-01-11 14:23:34,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:23:34,184 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 66 transitions. [2019-01-11 14:23:34,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-11 14:23:34,184 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 66 transitions. [2019-01-11 14:23:34,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 14:23:34,184 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:23:34,185 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 14:23:34,185 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:23:34,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:34,185 INFO L82 PathProgramCache]: Analyzing trace with hash 30132, now seen corresponding path program 1 times [2019-01-11 14:23:34,185 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:23:34,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:34,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:34,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:34,187 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:23:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:34,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:23:34,341 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:23:34,342 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 14:23:34,342 INFO L207 CegarAbsIntRunner]: [0], [10], [31] [2019-01-11 14:23:34,345 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:23:34,345 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:23:34,355 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:23:34,356 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. [2019-01-11 14:23:34,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:34,356 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:23:34,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:23:34,357 INFO 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 [2019-01-11 14:23:34,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:34,369 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:23:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:34,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:23:34,503 WARN L181 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2019-01-11 14:23:34,507 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 [2019-01-11 14:23:34,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,512 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 [2019-01-11 14:23:34,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,578 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 [2019-01-11 14:23:34,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,603 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 [2019-01-11 14:23:34,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,629 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 [2019-01-11 14:23:34,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,643 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-01-11 14:23:34,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,697 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 [2019-01-11 14:23:34,699 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:34,853 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:34,903 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:34,929 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:34,955 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:34,973 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:35,006 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:35,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,057 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 [2019-01-11 14:23:35,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,092 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 [2019-01-11 14:23:35,124 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-01-11 14:23:35,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,174 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 [2019-01-11 14:23:35,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,242 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 [2019-01-11 14:23:35,243 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:35,246 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:35,248 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:35,270 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:35,272 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:35,305 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. [2019-01-11 14:23:35,305 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:82, output treesize:54 [2019-01-11 14:23:35,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,374 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 [2019-01-11 14:23:35,375 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:35,469 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. [2019-01-11 14:23:35,469 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-11 14:23:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:36,798 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:23:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:36,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:23:36,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 14:23:36,829 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:23:36,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 14:23:36,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 14:23:36,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:23:36,830 INFO L87 Difference]: Start difference. First operand 23 states and 66 transitions. Second operand 6 states. [2019-01-11 14:23:55,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:23:55,674 INFO L93 Difference]: Finished difference Result 57 states and 111 transitions. [2019-01-11 14:23:55,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 14:23:55,674 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 14:23:55,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:23:55,675 INFO L225 Difference]: With dead ends: 57 [2019-01-11 14:23:55,676 INFO L226 Difference]: Without dead ends: 56 [2019-01-11 14:23:55,676 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 [2019-01-11 14:23:55,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-01-11 14:23:55,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 25. [2019-01-11 14:23:55,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-01-11 14:23:55,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 82 transitions. [2019-01-11 14:23:55,683 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 82 transitions. Word has length 3 [2019-01-11 14:23:55,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:23:55,683 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 82 transitions. [2019-01-11 14:23:55,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 14:23:55,683 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 82 transitions. [2019-01-11 14:23:55,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 14:23:55,684 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:23:55,684 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 14:23:55,684 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:23:55,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:55,685 INFO L82 PathProgramCache]: Analyzing trace with hash 30628, now seen corresponding path program 1 times [2019-01-11 14:23:55,685 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:23:55,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:55,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:55,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:55,686 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:23:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:55,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:23:55,771 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:23:55,772 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 14:23:55,772 INFO L207 CegarAbsIntRunner]: [0], [26], [31] [2019-01-11 14:23:55,773 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:23:55,773 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:23:55,781 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:23:55,781 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. [2019-01-11 14:23:55,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:55,782 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:23:55,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:23:55,782 INFO 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 [2019-01-11 14:23:55,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:55,792 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:23:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:55,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:23:55,905 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 [2019-01-11 14:23:55,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,911 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 [2019-01-11 14:23:55,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,918 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 [2019-01-11 14:23:55,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,999 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 [2019-01-11 14:23:56,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,030 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-01-11 14:23:56,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,060 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 [2019-01-11 14:23:56,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,089 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 [2019-01-11 14:23:56,091 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,160 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,193 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,221 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,245 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,263 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,280 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,331 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 [2019-01-11 14:23:56,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,361 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 [2019-01-11 14:23:56,374 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 [2019-01-11 14:23:56,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,382 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-01-11 14:23:56,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,454 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 [2019-01-11 14:23:56,455 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,457 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,459 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,461 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,464 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,498 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. [2019-01-11 14:23:56,498 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:82, output treesize:54 [2019-01-11 14:23:56,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,550 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 [2019-01-11 14:23:56,551 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,640 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. [2019-01-11 14:23:56,640 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-11 14:23:57,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:57,858 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:23:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:57,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:23:57,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 14:23:57,888 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:23:57,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 14:23:57,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 14:23:57,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:23:57,889 INFO L87 Difference]: Start difference. First operand 25 states and 82 transitions. Second operand 6 states. [2019-01-11 14:24:16,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:24:16,403 INFO L93 Difference]: Finished difference Result 59 states and 127 transitions. [2019-01-11 14:24:16,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 14:24:16,405 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 14:24:16,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:24:16,406 INFO L225 Difference]: With dead ends: 59 [2019-01-11 14:24:16,406 INFO L226 Difference]: Without dead ends: 57 [2019-01-11 14:24:16,406 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 [2019-01-11 14:24:16,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-01-11 14:24:16,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 29. [2019-01-11 14:24:16,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-01-11 14:24:16,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 101 transitions. [2019-01-11 14:24:16,414 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 101 transitions. Word has length 3 [2019-01-11 14:24:16,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:24:16,414 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 101 transitions. [2019-01-11 14:24:16,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 14:24:16,414 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 101 transitions. [2019-01-11 14:24:16,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:24:16,415 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:24:16,415 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:24:16,415 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:24:16,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:16,416 INFO L82 PathProgramCache]: Analyzing trace with hash 955362, now seen corresponding path program 1 times [2019-01-11 14:24:16,416 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:24:16,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:16,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:16,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:16,417 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:24:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:16,457 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-11 14:24:16,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-11 14:24:16,457 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 14:24:16,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-11 14:24:16,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-11 14:24:16,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 14:24:16,458 INFO L87 Difference]: Start difference. First operand 29 states and 101 transitions. Second operand 3 states. [2019-01-11 14:24:16,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:24:16,521 INFO L93 Difference]: Finished difference Result 33 states and 102 transitions. [2019-01-11 14:24:16,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 14:24:16,522 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-01-11 14:24:16,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:24:16,522 INFO L225 Difference]: With dead ends: 33 [2019-01-11 14:24:16,523 INFO L226 Difference]: Without dead ends: 32 [2019-01-11 14:24:16,523 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 [2019-01-11 14:24:16,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-01-11 14:24:16,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2019-01-11 14:24:16,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-01-11 14:24:16,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 100 transitions. [2019-01-11 14:24:16,530 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 100 transitions. Word has length 4 [2019-01-11 14:24:16,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:24:16,530 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 100 transitions. [2019-01-11 14:24:16,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-11 14:24:16,530 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 100 transitions. [2019-01-11 14:24:16,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:24:16,531 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:24:16,531 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:24:16,532 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:24:16,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:16,532 INFO L82 PathProgramCache]: Analyzing trace with hash 941844, now seen corresponding path program 1 times [2019-01-11 14:24:16,532 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:24:16,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:16,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:16,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:16,533 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:24:16,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:16,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:16,619 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:24:16,619 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:24:16,619 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [33] [2019-01-11 14:24:16,620 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:24:16,621 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:24:16,632 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:24:16,632 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. [2019-01-11 14:24:16,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:16,633 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:24:16,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:16,633 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-11 14:24:16,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:16,641 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:24:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:16,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:24:16,656 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 23 [2019-01-11 14:24:16,660 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 [2019-01-11 14:24:16,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:16,675 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 [2019-01-11 14:24:16,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:16,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:16,688 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 [2019-01-11 14:24:16,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:16,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:16,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:16,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:16,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:16,726 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 [2019-01-11 14:24:16,727 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:16,741 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:16,747 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:16,749 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:16,751 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:16,769 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 [2019-01-11 14:24:16,775 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 [2019-01-11 14:24:16,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:16,784 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2019-01-11 14:24:16,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:16,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:16,792 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-01-11 14:24:16,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:16,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:16,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:16,812 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2019-01-11 14:24:16,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:16,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:16,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:16,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:16,838 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 [2019-01-11 14:24:16,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:16,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:16,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:16,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:16,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:16,857 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 [2019-01-11 14:24:16,859 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:16,937 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:16,962 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:16,982 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:16,998 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:17,013 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:17,028 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:17,057 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. [2019-01-11 14:24:17,057 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:60, output treesize:55 [2019-01-11 14:24:17,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,170 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 [2019-01-11 14:24:17,171 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-11 14:24:17,388 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. [2019-01-11 14:24:17,388 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:65, output treesize:104 [2019-01-11 14:24:18,913 WARN L181 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2019-01-11 14:24:18,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:18,919 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:24:18,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:18,993 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-11 14:24:18,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 6 [2019-01-11 14:24:18,994 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 14:24:18,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-11 14:24:18,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-11 14:24:18,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:24:18,995 INFO L87 Difference]: Start difference. First operand 29 states and 100 transitions. Second operand 4 states. [2019-01-11 14:24:19,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:24:19,051 INFO L93 Difference]: Finished difference Result 33 states and 111 transitions. [2019-01-11 14:24:19,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 14:24:19,052 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-11 14:24:19,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:24:19,053 INFO L225 Difference]: With dead ends: 33 [2019-01-11 14:24:19,054 INFO L226 Difference]: Without dead ends: 32 [2019-01-11 14:24:19,054 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:24:19,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-01-11 14:24:19,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-01-11 14:24:19,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-01-11 14:24:19,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 110 transitions. [2019-01-11 14:24:19,062 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 110 transitions. Word has length 4 [2019-01-11 14:24:19,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:24:19,062 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 110 transitions. [2019-01-11 14:24:19,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-11 14:24:19,062 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 110 transitions. [2019-01-11 14:24:19,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:24:19,063 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:24:19,063 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:24:19,064 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:24:19,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:19,064 INFO L82 PathProgramCache]: Analyzing trace with hash 941532, now seen corresponding path program 1 times [2019-01-11 14:24:19,064 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:24:19,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:19,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:19,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:19,065 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:24:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:19,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:19,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:19,181 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:24:19,181 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:24:19,181 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [31] [2019-01-11 14:24:19,183 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:24:19,183 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:24:19,190 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:24:19,190 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. [2019-01-11 14:24:19,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:19,190 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:24:19,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:19,191 INFO 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 [2019-01-11 14:24:19,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:19,200 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:24:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:19,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:24:19,272 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 [2019-01-11 14:24:19,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,279 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 [2019-01-11 14:24:19,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,287 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 [2019-01-11 14:24:19,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,297 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-01-11 14:24:19,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,311 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 [2019-01-11 14:24:19,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,322 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 [2019-01-11 14:24:19,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,357 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-11 14:24:19,358 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:19,428 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:19,475 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:19,509 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:19,532 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:19,554 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:19,575 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:19,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,623 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 [2019-01-11 14:24:19,627 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 [2019-01-11 14:24:19,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,634 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 [2019-01-11 14:24:19,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,643 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 [2019-01-11 14:24:19,749 WARN L181 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2019-01-11 14:24:19,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,760 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 [2019-01-11 14:24:19,761 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:19,763 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:19,765 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:19,767 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:19,770 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:19,799 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. [2019-01-11 14:24:19,800 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:71, output treesize:54 [2019-01-11 14:24:19,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,865 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 [2019-01-11 14:24:19,866 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:20,029 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. [2019-01-11 14:24:20,030 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 14:24:20,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:20,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:20,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:20,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:20,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:20,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:20,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:20,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:20,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:20,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:20,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:20,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:20,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:20,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:20,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:20,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:20,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:20,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:20,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:20,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:20,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:20,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:20,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:20,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:20,090 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 [2019-01-11 14:24:20,091 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:20,183 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. [2019-01-11 14:24:20,184 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-11 14:24:22,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:22,532 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:24:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:22,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:24:22,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:24:22,578 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:24:22,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:24:22,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:24:22,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:24:22,579 INFO L87 Difference]: Start difference. First operand 31 states and 110 transitions. Second operand 8 states. [2019-01-11 14:24:57,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:24:57,914 INFO L93 Difference]: Finished difference Result 74 states and 179 transitions. [2019-01-11 14:24:57,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 14:24:57,917 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:24:57,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:24:57,918 INFO L225 Difference]: With dead ends: 74 [2019-01-11 14:24:57,918 INFO L226 Difference]: Without dead ends: 72 [2019-01-11 14:24:57,918 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 [2019-01-11 14:24:57,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-01-11 14:24:57,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 38. [2019-01-11 14:24:57,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-01-11 14:24:57,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 139 transitions. [2019-01-11 14:24:57,926 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 139 transitions. Word has length 4 [2019-01-11 14:24:57,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:24:57,926 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 139 transitions. [2019-01-11 14:24:57,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:24:57,927 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 139 transitions. [2019-01-11 14:24:57,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:24:57,927 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:24:57,927 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:24:57,928 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:24:57,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:57,928 INFO L82 PathProgramCache]: Analyzing trace with hash 941160, now seen corresponding path program 1 times [2019-01-11 14:24:57,928 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:24:57,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:57,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:57,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:57,929 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:24:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:58,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:58,056 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:24:58,056 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:24:58,056 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [31] [2019-01-11 14:24:58,057 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:24:58,057 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:24:58,063 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:24:58,063 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. [2019-01-11 14:24:58,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:58,064 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:24:58,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:58,064 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-11 14:24:58,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:58,074 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:24:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:58,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:24:58,161 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2019-01-11 14:24:58,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,166 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 [2019-01-11 14:24:58,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,178 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 [2019-01-11 14:24:58,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,197 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 [2019-01-11 14:24:58,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,214 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 [2019-01-11 14:24:58,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,231 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 [2019-01-11 14:24:58,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,254 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 [2019-01-11 14:24:58,255 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:58,313 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:58,352 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:58,380 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:58,401 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:58,422 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:58,439 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:58,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,490 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 [2019-01-11 14:24:58,493 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 [2019-01-11 14:24:58,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,512 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 [2019-01-11 14:24:58,520 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 [2019-01-11 14:24:58,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,572 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 [2019-01-11 14:24:58,573 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:58,574 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:58,576 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:58,578 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:58,580 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:58,609 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. [2019-01-11 14:24:58,609 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:85, output treesize:54 [2019-01-11 14:24:58,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,694 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 [2019-01-11 14:24:58,695 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:58,772 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. [2019-01-11 14:24:58,773 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 14:24:58,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,995 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:24:58,997 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 [2019-01-11 14:24:58,998 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:59,528 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. [2019-01-11 14:24:59,528 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:54 [2019-01-11 14:25:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:01,860 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:25:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:01,901 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:25:01,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:25:01,901 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:25:01,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:25:01,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:25:01,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:25:01,902 INFO L87 Difference]: Start difference. First operand 38 states and 139 transitions. Second operand 8 states. [2019-01-11 14:25:39,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:25:39,016 INFO L93 Difference]: Finished difference Result 71 states and 181 transitions. [2019-01-11 14:25:39,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 14:25:39,017 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:25:39,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:25:39,018 INFO L225 Difference]: With dead ends: 71 [2019-01-11 14:25:39,018 INFO L226 Difference]: Without dead ends: 70 [2019-01-11 14:25:39,019 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 [2019-01-11 14:25:39,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-01-11 14:25:39,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 38. [2019-01-11 14:25:39,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-01-11 14:25:39,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 139 transitions. [2019-01-11 14:25:39,031 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 139 transitions. Word has length 4 [2019-01-11 14:25:39,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:25:39,031 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 139 transitions. [2019-01-11 14:25:39,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:25:39,031 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 139 transitions. [2019-01-11 14:25:39,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:25:39,032 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:25:39,032 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:25:39,032 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:25:39,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:39,033 INFO L82 PathProgramCache]: Analyzing trace with hash 941656, now seen corresponding path program 1 times [2019-01-11 14:25:39,033 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:25:39,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:39,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:39,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:39,034 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:25:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:39,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:39,123 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:25:39,123 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:25:39,123 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [31] [2019-01-11 14:25:39,124 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:25:39,124 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:25:39,132 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:25:39,132 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. [2019-01-11 14:25:39,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:39,133 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:25:39,133 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:39,133 INFO 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 [2019-01-11 14:25:39,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:39,146 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:25:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:39,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:25:39,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,222 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 [2019-01-11 14:25:39,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,262 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 [2019-01-11 14:25:39,266 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 [2019-01-11 14:25:39,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,273 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 [2019-01-11 14:25:39,487 WARN L181 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2019-01-11 14:25:39,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,499 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 [2019-01-11 14:25:39,500 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,502 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,503 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,505 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,508 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,528 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 [2019-01-11 14:25:39,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,534 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 [2019-01-11 14:25:39,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,540 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 [2019-01-11 14:25:39,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,555 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-01-11 14:25:39,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,622 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-01-11 14:25:39,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,634 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 [2019-01-11 14:25:39,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,647 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 [2019-01-11 14:25:39,649 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,720 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,753 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,776 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,794 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,810 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,823 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,852 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. [2019-01-11 14:25:39,852 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:82, output treesize:54 [2019-01-11 14:25:39,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,913 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 [2019-01-11 14:25:39,914 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,994 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. [2019-01-11 14:25:39,995 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 14:25:40,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:40,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:40,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:40,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:40,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:40,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:40,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:40,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:40,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:40,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:40,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:40,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:40,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:40,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:40,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:40,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:40,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:40,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:40,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:40,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:40,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:40,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:40,067 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:25:40,068 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 [2019-01-11 14:25:40,069 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:40,156 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. [2019-01-11 14:25:40,156 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:54 [2019-01-11 14:25:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:42,462 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:25:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:42,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:25:42,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:25:42,500 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:25:42,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:25:42,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:25:42,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:25:42,506 INFO L87 Difference]: Start difference. First operand 38 states and 139 transitions. Second operand 8 states. [2019-01-11 14:26:16,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:26:16,963 INFO L93 Difference]: Finished difference Result 71 states and 181 transitions. [2019-01-11 14:26:16,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 14:26:16,964 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:26:16,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:26:16,965 INFO L225 Difference]: With dead ends: 71 [2019-01-11 14:26:16,965 INFO L226 Difference]: Without dead ends: 69 [2019-01-11 14:26:16,966 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 [2019-01-11 14:26:16,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-01-11 14:26:16,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 37. [2019-01-11 14:26:16,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-01-11 14:26:16,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 138 transitions. [2019-01-11 14:26:16,973 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 138 transitions. Word has length 4 [2019-01-11 14:26:16,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:26:16,973 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 138 transitions. [2019-01-11 14:26:16,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:26:16,973 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 138 transitions. [2019-01-11 14:26:16,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:26:16,974 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:26:16,974 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:26:16,974 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:26:16,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:26:16,975 INFO L82 PathProgramCache]: Analyzing trace with hash 941718, now seen corresponding path program 1 times [2019-01-11 14:26:16,975 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:26:16,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:26:16,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:26:16,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:26:16,976 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:26:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:26:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:26:17,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:26:17,105 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:26:17,105 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:26:17,106 INFO L207 CegarAbsIntRunner]: [0], [18], [28], [31] [2019-01-11 14:26:17,106 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:26:17,106 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:26:17,113 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:26:17,113 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. [2019-01-11 14:26:17,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:26:17,113 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:26:17,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:26:17,113 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:26:17,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:26:17,128 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:26:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:26:17,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:26:17,296 WARN L181 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2019-01-11 14:26:17,299 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 [2019-01-11 14:26:17,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,305 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 [2019-01-11 14:26:17,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,310 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-11 14:26:17,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,316 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 [2019-01-11 14:26:17,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,323 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 [2019-01-11 14:26:17,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,366 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 [2019-01-11 14:26:17,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,377 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 [2019-01-11 14:26:17,378 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:17,436 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:17,468 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:17,495 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:17,516 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:17,531 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:17,548 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:17,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,592 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 [2019-01-11 14:26:17,596 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 [2019-01-11 14:26:17,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,639 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 [2019-01-11 14:26:17,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,644 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 [2019-01-11 14:26:17,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,675 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 [2019-01-11 14:26:17,676 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:17,678 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:17,680 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:17,682 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:17,687 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:17,714 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. [2019-01-11 14:26:17,714 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:71, output treesize:54 [2019-01-11 14:26:17,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:17,811 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 [2019-01-11 14:26:17,812 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:17,903 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. [2019-01-11 14:26:17,904 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 14:26:18,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:18,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:18,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:18,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:18,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:18,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:18,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:18,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:18,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:18,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:18,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:18,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:18,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:18,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:18,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:18,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:18,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:18,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:18,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:18,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:18,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:18,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:18,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:18,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:18,131 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 [2019-01-11 14:26:18,132 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:18,258 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. [2019-01-11 14:26:18,259 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-11 14:26:20,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:26:20,816 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:26:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:26:20,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:26:20,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:26:20,871 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:26:20,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:26:20,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:26:20,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:26:20,872 INFO L87 Difference]: Start difference. First operand 37 states and 138 transitions. Second operand 8 states. [2019-01-11 14:26:54,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:26:54,903 INFO L93 Difference]: Finished difference Result 74 states and 200 transitions. [2019-01-11 14:26:54,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 14:26:54,904 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:26:54,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:26:54,904 INFO L225 Difference]: With dead ends: 74 [2019-01-11 14:26:54,904 INFO L226 Difference]: Without dead ends: 63 [2019-01-11 14:26:54,905 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-11 14:26:54,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-01-11 14:26:54,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 35. [2019-01-11 14:26:54,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-01-11 14:26:54,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 155 transitions. [2019-01-11 14:26:54,913 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 155 transitions. Word has length 4 [2019-01-11 14:26:54,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:26:54,913 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 155 transitions. [2019-01-11 14:26:54,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:26:54,913 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 155 transitions. [2019-01-11 14:26:54,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:26:54,914 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:26:54,914 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:26:54,914 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:26:54,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:26:54,914 INFO L82 PathProgramCache]: Analyzing trace with hash 941284, now seen corresponding path program 1 times [2019-01-11 14:26:54,915 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:26:54,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:26:54,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:26:54,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:26:54,916 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:26:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:26:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:26:55,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:26:55,026 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:26:55,026 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:26:55,026 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [31] [2019-01-11 14:26:55,027 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:26:55,027 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:26:55,033 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:26:55,033 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. [2019-01-11 14:26:55,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:26:55,034 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:26:55,034 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:26:55,034 INFO 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 [2019-01-11 14:26:55,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:26:55,049 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:26:55,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:26:55,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:26:55,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,112 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 [2019-01-11 14:26:55,116 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 [2019-01-11 14:26:55,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,120 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 [2019-01-11 14:26:55,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,127 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 [2019-01-11 14:26:55,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,157 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 [2019-01-11 14:26:55,158 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:55,161 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:55,162 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:55,164 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:55,165 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:55,180 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 [2019-01-11 14:26:55,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,183 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 [2019-01-11 14:26:55,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,196 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 [2019-01-11 14:26:55,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,202 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 [2019-01-11 14:26:55,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,242 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-01-11 14:26:55,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,251 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 [2019-01-11 14:26:55,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,261 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 [2019-01-11 14:26:55,262 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:55,327 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:55,359 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:55,383 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:55,402 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:55,417 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:55,431 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:55,458 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. [2019-01-11 14:26:55,459 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:71, output treesize:54 [2019-01-11 14:26:55,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,520 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 [2019-01-11 14:26:55,521 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:55,602 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. [2019-01-11 14:26:55,603 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 14:26:55,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:55,680 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 [2019-01-11 14:26:55,681 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:55,777 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. [2019-01-11 14:26:55,778 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-11 14:26:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:26:58,076 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:26:58,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:26:58,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:26:58,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:26:58,180 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:26:58,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:26:58,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:26:58,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:26:58,181 INFO L87 Difference]: Start difference. First operand 35 states and 155 transitions. Second operand 8 states. [2019-01-11 14:27:11,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:27:11,161 INFO L93 Difference]: Finished difference Result 67 states and 213 transitions. [2019-01-11 14:27:11,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 14:27:11,161 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:27:11,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:27:11,162 INFO L225 Difference]: With dead ends: 67 [2019-01-11 14:27:11,162 INFO L226 Difference]: Without dead ends: 65 [2019-01-11 14:27:11,163 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 [2019-01-11 14:27:11,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-01-11 14:27:11,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2019-01-11 14:27:11,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-01-11 14:27:11,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 178 transitions. [2019-01-11 14:27:11,172 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 178 transitions. Word has length 4 [2019-01-11 14:27:11,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:27:11,172 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 178 transitions. [2019-01-11 14:27:11,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:27:11,172 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 178 transitions. [2019-01-11 14:27:11,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:27:11,173 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:27:11,173 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:27:11,173 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:27:11,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:27:11,174 INFO L82 PathProgramCache]: Analyzing trace with hash 930312, now seen corresponding path program 1 times [2019-01-11 14:27:11,174 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:27:11,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:27:11,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:27:11,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:27:11,176 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:27:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:27:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:27:11,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:27:11,238 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:27:11,239 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:27:11,239 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [33] [2019-01-11 14:27:11,240 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:27:11,240 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:27:11,246 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:27:11,246 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. [2019-01-11 14:27:11,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:27:11,246 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:27:11,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:27:11,247 INFO 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 [2019-01-11 14:27:11,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:27:11,256 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:27:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:27:11,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:27:11,305 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 [2019-01-11 14:27:11,307 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 [2019-01-11 14:27:11,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,313 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 [2019-01-11 14:27:11,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,321 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-01-11 14:27:11,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,332 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 [2019-01-11 14:27:11,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,350 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 [2019-01-11 14:27:11,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,364 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-11 14:27:11,365 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:27:11,426 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:11,451 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:11,475 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:11,494 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:11,511 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:11,525 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:11,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,565 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 [2019-01-11 14:27:11,568 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 [2019-01-11 14:27:11,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,573 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2019-01-11 14:27:11,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,580 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 45 [2019-01-11 14:27:11,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,611 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 [2019-01-11 14:27:11,611 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 14:27:11,625 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:11,690 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:11,694 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:11,698 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:11,727 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. [2019-01-11 14:27:11,728 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:68, output treesize:59 [2019-01-11 14:27:11,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,905 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 [2019-01-11 14:27:11,911 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2019-01-11 14:27:12,269 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. [2019-01-11 14:27:12,270 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:69, output treesize:236 [2019-01-11 14:27:35,245 WARN L181 SmtUtils]: Spent 22.15 s on a formula simplification that was a NOOP. DAG size: 126 [2019-01-11 14:27:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:27:35,260 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:27:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:27:35,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:27:35,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 14:27:35,419 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:27:35,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 14:27:35,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 14:27:35,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:27:35,420 INFO L87 Difference]: Start difference. First operand 38 states and 178 transitions. Second operand 6 states. [2019-01-11 14:28:19,735 WARN L181 SmtUtils]: Spent 44.20 s on a formula simplification. DAG size of input: 133 DAG size of output: 131 [2019-01-11 14:28:22,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:28:22,366 INFO L93 Difference]: Finished difference Result 63 states and 216 transitions. [2019-01-11 14:28:22,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 14:28:22,367 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-11 14:28:22,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:28:22,367 INFO L225 Difference]: With dead ends: 63 [2019-01-11 14:28:22,368 INFO L226 Difference]: Without dead ends: 62 [2019-01-11 14:28:22,368 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 67.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 14:28:22,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-01-11 14:28:22,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 39. [2019-01-11 14:28:22,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-01-11 14:28:22,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 186 transitions. [2019-01-11 14:28:22,377 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 186 transitions. Word has length 4 [2019-01-11 14:28:22,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:28:22,377 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 186 transitions. [2019-01-11 14:28:22,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 14:28:22,378 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 186 transitions. [2019-01-11 14:28:22,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:28:22,378 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:28:22,378 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:28:22,379 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:28:22,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:28:22,379 INFO L82 PathProgramCache]: Analyzing trace with hash 929876, now seen corresponding path program 1 times [2019-01-11 14:28:22,379 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:28:22,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:28:22,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:28:22,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:28:22,380 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:28:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:28:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:28:22,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:28:22,492 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:28:22,492 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:28:22,492 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [31] [2019-01-11 14:28:22,494 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:28:22,494 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:28:22,498 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:28:22,499 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. [2019-01-11 14:28:22,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:28:22,499 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:28:22,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:28:22,499 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:28:22,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:28:22,517 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:28:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:28:22,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:28:22,578 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 [2019-01-11 14:28:22,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,598 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-01-11 14:28:22,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,607 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 [2019-01-11 14:28:22,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,644 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 [2019-01-11 14:28:22,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,656 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 [2019-01-11 14:28:22,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,666 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-01-11 14:28:22,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,678 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 [2019-01-11 14:28:22,679 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:28:22,737 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:28:22,772 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:28:22,796 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:28:22,816 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:28:22,831 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:28:22,845 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:28:22,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,885 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 [2019-01-11 14:28:22,889 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 [2019-01-11 14:28:22,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,893 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 [2019-01-11 14:28:22,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,900 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 [2019-01-11 14:28:22,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,932 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 [2019-01-11 14:28:22,932 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 14:28:22,935 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:28:22,937 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:28:22,939 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:28:22,941 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:28:22,970 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. [2019-01-11 14:28:22,970 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:71, output treesize:54 [2019-01-11 14:28:22,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:22,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,019 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 [2019-01-11 14:28:23,020 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:28:23,106 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. [2019-01-11 14:28:23,107 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 14:28:23,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:23,189 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 132 [2019-01-11 14:28:23,190 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:28:23,342 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. [2019-01-11 14:28:23,342 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-11 14:28:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:28:24,553 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:28:24,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:28:24,597 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:28:24,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:28:24,597 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:28:24,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:28:24,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:28:24,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:28:24,598 INFO L87 Difference]: Start difference. First operand 39 states and 186 transitions. Second operand 8 states. [2019-01-11 14:28:46,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:28:46,496 INFO L93 Difference]: Finished difference Result 92 states and 272 transitions. [2019-01-11 14:28:46,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-11 14:28:46,497 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:28:46,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:28:46,499 INFO L225 Difference]: With dead ends: 92 [2019-01-11 14:28:46,499 INFO L226 Difference]: Without dead ends: 90 [2019-01-11 14:28:46,499 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-01-11 14:28:46,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-01-11 14:28:46,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 46. [2019-01-11 14:28:46,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-01-11 14:28:46,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 222 transitions. [2019-01-11 14:28:46,509 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 222 transitions. Word has length 4 [2019-01-11 14:28:46,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:28:46,509 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 222 transitions. [2019-01-11 14:28:46,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:28:46,509 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 222 transitions. [2019-01-11 14:28:46,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:28:46,512 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:28:46,512 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:28:46,513 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:28:46,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:28:46,513 INFO L82 PathProgramCache]: Analyzing trace with hash 929628, now seen corresponding path program 1 times [2019-01-11 14:28:46,513 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:28:46,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:28:46,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:28:46,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:28:46,514 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:28:46,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:28:46,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:28:46,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:28:46,603 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:28:46,604 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:28:46,604 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [31] [2019-01-11 14:28:46,605 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:28:46,605 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:28:46,609 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:28:46,610 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. [2019-01-11 14:28:46,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:28:46,610 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:28:46,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:28:46,610 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:28:46,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:28:46,622 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:28:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:28:46,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:28:46,710 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 [2019-01-11 14:28:46,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:46,716 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-01-11 14:28:46,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:46,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:46,721 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 [2019-01-11 14:28:46,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:46,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:46,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:46,729 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-01-11 14:28:46,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:46,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:46,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:46,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:46,740 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 [2019-01-11 14:28:46,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:46,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:46,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:46,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:46,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:46,751 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 [2019-01-11 14:28:46,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:46,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:46,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:46,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:46,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:46,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:46,764 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 [2019-01-11 14:28:46,765 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:28:46,824 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:28:46,861 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:28:46,887 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:28:46,910 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:28:46,928 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:28:46,944 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:28:46,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:46,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:46,994 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-01-11 14:28:47,011 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 [2019-01-11 14:28:47,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,033 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-01-11 14:28:47,038 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 [2019-01-11 14:28:47,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,091 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 [2019-01-11 14:28:47,092 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 14:28:47,095 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:28:47,096 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:28:47,098 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:28:47,100 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:28:47,128 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. [2019-01-11 14:28:47,128 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:85, output treesize:54 [2019-01-11 14:28:47,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,181 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 [2019-01-11 14:28:47,181 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:28:47,267 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. [2019-01-11 14:28:47,268 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 14:28:47,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:28:47,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-11 14:28:47,326 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:28:47,415 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. [2019-01-11 14:28:47,415 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-11 14:28:48,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:28:48,629 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:28:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:28:48,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:28:48,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:28:48,665 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:28:48,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:28:48,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:28:48,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:28:48,666 INFO L87 Difference]: Start difference. First operand 46 states and 222 transitions. Second operand 8 states. [2019-01-11 14:29:09,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:29:09,652 INFO L93 Difference]: Finished difference Result 96 states and 311 transitions. [2019-01-11 14:29:09,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-11 14:29:09,652 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:29:09,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:29:09,654 INFO L225 Difference]: With dead ends: 96 [2019-01-11 14:29:09,654 INFO L226 Difference]: Without dead ends: 95 [2019-01-11 14:29:09,655 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-01-11 14:29:09,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-01-11 14:29:09,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 51. [2019-01-11 14:29:09,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-01-11 14:29:09,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 262 transitions. [2019-01-11 14:29:09,665 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 262 transitions. Word has length 4 [2019-01-11 14:29:09,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:29:09,665 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 262 transitions. [2019-01-11 14:29:09,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:29:09,666 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 262 transitions. [2019-01-11 14:29:09,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:29:09,666 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:29:09,666 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:29:09,667 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:29:09,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:29:09,667 INFO L82 PathProgramCache]: Analyzing trace with hash 930124, now seen corresponding path program 1 times [2019-01-11 14:29:09,667 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:29:09,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:29:09,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:29:09,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:29:09,668 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:29:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:29:09,878 WARN L181 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 9 [2019-01-11 14:29:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:29:09,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:29:09,899 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:29:09,899 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:29:09,900 INFO L207 CegarAbsIntRunner]: [0], [6], [26], [31] [2019-01-11 14:29:09,901 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:29:09,901 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:29:09,905 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:29:09,905 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. [2019-01-11 14:29:09,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:29:09,905 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:29:09,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:29:09,905 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:29:09,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:29:09,920 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:29:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:29:09,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:29:10,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,010 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 [2019-01-11 14:29:10,013 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 [2019-01-11 14:29:10,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,036 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 [2019-01-11 14:29:10,040 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 [2019-01-11 14:29:10,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,094 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 [2019-01-11 14:29:10,094 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-11 14:29:10,097 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:10,099 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:10,100 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:10,103 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:10,118 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 [2019-01-11 14:29:10,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,124 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 [2019-01-11 14:29:10,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,129 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2019-01-11 14:29:10,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,138 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 [2019-01-11 14:29:10,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,148 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 [2019-01-11 14:29:10,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,292 INFO L303 Elim1Store]: Index analysis took 141 ms [2019-01-11 14:29:10,293 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 [2019-01-11 14:29:10,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,443 INFO L303 Elim1Store]: Index analysis took 148 ms [2019-01-11 14:29:10,443 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 [2019-01-11 14:29:10,444 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 14:29:10,537 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:10,568 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:10,592 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:10,611 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:10,626 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:10,640 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:10,667 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. [2019-01-11 14:29:10,667 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:85, output treesize:54 [2019-01-11 14:29:10,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,716 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 [2019-01-11 14:29:10,717 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:29:10,855 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. [2019-01-11 14:29:10,856 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 14:29:10,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:10,908 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-11 14:29:10,908 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:29:11,001 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. [2019-01-11 14:29:11,001 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-11 14:29:12,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:29:12,231 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:29:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:29:12,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:29:12,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:29:12,266 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:29:12,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:29:12,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:29:12,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:29:12,267 INFO L87 Difference]: Start difference. First operand 51 states and 262 transitions. Second operand 8 states. [2019-01-11 14:29:33,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:29:33,368 INFO L93 Difference]: Finished difference Result 100 states and 343 transitions. [2019-01-11 14:29:33,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-11 14:29:33,368 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:29:33,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:29:33,370 INFO L225 Difference]: With dead ends: 100 [2019-01-11 14:29:33,370 INFO L226 Difference]: Without dead ends: 98 [2019-01-11 14:29:33,372 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-01-11 14:29:33,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-01-11 14:29:33,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 57. [2019-01-11 14:29:33,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-01-11 14:29:33,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 297 transitions. [2019-01-11 14:29:33,383 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 297 transitions. Word has length 4 [2019-01-11 14:29:33,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:29:33,383 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 297 transitions. [2019-01-11 14:29:33,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:29:33,384 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 297 transitions. [2019-01-11 14:29:33,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:29:33,384 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:29:33,384 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:29:33,385 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:29:33,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:29:33,385 INFO L82 PathProgramCache]: Analyzing trace with hash 945688, now seen corresponding path program 1 times [2019-01-11 14:29:33,385 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:29:33,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:29:33,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:29:33,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:29:33,386 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:29:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:29:33,563 WARN L181 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2019-01-11 14:29:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:29:33,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:29:33,567 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:29:33,567 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:29:33,568 INFO L207 CegarAbsIntRunner]: [0], [22], [32], [33] [2019-01-11 14:29:33,568 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:29:33,568 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:29:33,573 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:29:33,578 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. [2019-01-11 14:29:33,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:29:33,578 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:29:33,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:29:33,579 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:29:33,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:29:33,588 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:29:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:29:33,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:29:33,625 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 [2019-01-11 14:29:33,629 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-01-11 14:29:33,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,636 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 [2019-01-11 14:29:33,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,643 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 53 [2019-01-11 14:29:33,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,652 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2019-01-11 14:29:33,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,664 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 89 [2019-01-11 14:29:33,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,705 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 108 [2019-01-11 14:29:33,706 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:29:33,756 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:33,785 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:33,806 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:33,826 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:33,843 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:33,859 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:33,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,901 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 [2019-01-11 14:29:33,905 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 [2019-01-11 14:29:33,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,924 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 58 [2019-01-11 14:29:33,929 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 49 [2019-01-11 14:29:33,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:33,958 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-11 14:29:33,959 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 14:29:33,972 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:33,982 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:33,990 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:33,996 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:34,029 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. [2019-01-11 14:29:34,029 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:82, output treesize:63 [2019-01-11 14:29:34,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:34,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:34,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:34,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:34,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:34,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:34,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:34,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:34,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:34,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:34,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:34,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:34,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:34,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:34,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:34,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:34,109 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 118 [2019-01-11 14:29:34,111 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-11 14:29:34,289 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. [2019-01-11 14:29:34,289 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:73, output treesize:114 [2019-01-11 14:29:35,651 WARN L181 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2019-01-11 14:29:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:29:35,654 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:29:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:29:35,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:29:35,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 14:29:35,921 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:29:35,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 14:29:35,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 14:29:35,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:29:35,923 INFO L87 Difference]: Start difference. First operand 57 states and 297 transitions. Second operand 6 states. [2019-01-11 14:29:36,362 WARN L181 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2019-01-11 14:29:38,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:29:38,950 INFO L93 Difference]: Finished difference Result 81 states and 327 transitions. [2019-01-11 14:29:38,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 14:29:38,950 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-11 14:29:38,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:29:38,951 INFO L225 Difference]: With dead ends: 81 [2019-01-11 14:29:38,951 INFO L226 Difference]: Without dead ends: 80 [2019-01-11 14:29:38,951 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 14:29:38,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-01-11 14:29:38,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2019-01-11 14:29:38,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-01-11 14:29:38,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 297 transitions. [2019-01-11 14:29:38,963 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 297 transitions. Word has length 4 [2019-01-11 14:29:38,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:29:38,963 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 297 transitions. [2019-01-11 14:29:38,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 14:29:38,963 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 297 transitions. [2019-01-11 14:29:38,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:29:38,964 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:29:38,964 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:29:38,964 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:29:38,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:29:38,964 INFO L82 PathProgramCache]: Analyzing trace with hash 945004, now seen corresponding path program 1 times [2019-01-11 14:29:38,964 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:29:38,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:29:38,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:29:38,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:29:38,965 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:29:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:29:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:29:39,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:29:39,068 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:29:39,068 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:29:39,069 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [31] [2019-01-11 14:29:39,069 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:29:39,070 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:29:39,073 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:29:39,073 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. [2019-01-11 14:29:39,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:29:39,074 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:29:39,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:29:39,074 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:29:39,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:29:39,091 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:29:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:29:39,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:29:39,188 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2019-01-11 14:29:39,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,196 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 [2019-01-11 14:29:39,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,204 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2019-01-11 14:29:39,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,212 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 [2019-01-11 14:29:39,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,221 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 [2019-01-11 14:29:39,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,233 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 [2019-01-11 14:29:39,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,244 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 [2019-01-11 14:29:39,245 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:29:39,302 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:39,334 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:39,360 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:39,382 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:39,399 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:39,415 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:39,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,460 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 [2019-01-11 14:29:39,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,512 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 [2019-01-11 14:29:39,515 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 45 [2019-01-11 14:29:39,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,521 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-01-11 14:29:39,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,575 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 [2019-01-11 14:29:39,575 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 14:29:39,578 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:39,579 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:39,581 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:39,585 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:29:39,612 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. [2019-01-11 14:29:39,613 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:82, output treesize:54 [2019-01-11 14:29:39,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,667 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 [2019-01-11 14:29:39,668 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:29:39,756 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. [2019-01-11 14:29:39,757 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 14:29:39,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:29:39,990 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-11 14:29:39,991 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:29:40,083 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. [2019-01-11 14:29:40,084 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-11 14:29:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:29:42,475 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:29:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:29:42,516 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:29:42,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:29:42,516 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:29:42,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:29:42,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:29:42,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:29:42,517 INFO L87 Difference]: Start difference. First operand 57 states and 297 transitions. Second operand 8 states. [2019-01-11 14:30:10,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:30:10,852 INFO L93 Difference]: Finished difference Result 98 states and 365 transitions. [2019-01-11 14:30:10,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 14:30:10,858 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:30:10,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:30:10,859 INFO L225 Difference]: With dead ends: 98 [2019-01-11 14:30:10,859 INFO L226 Difference]: Without dead ends: 97 [2019-01-11 14:30:10,859 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 [2019-01-11 14:30:10,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-01-11 14:30:10,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 59. [2019-01-11 14:30:10,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-01-11 14:30:10,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 313 transitions. [2019-01-11 14:30:10,877 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 313 transitions. Word has length 4 [2019-01-11 14:30:10,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:30:10,878 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 313 transitions. [2019-01-11 14:30:10,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:30:10,878 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 313 transitions. [2019-01-11 14:30:10,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:30:10,878 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:30:10,878 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:30:10,879 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:30:10,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:30:10,879 INFO L82 PathProgramCache]: Analyzing trace with hash 945500, now seen corresponding path program 1 times [2019-01-11 14:30:10,879 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:30:10,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:30:10,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:30:10,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:30:10,880 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:30:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:30:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:30:11,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:30:11,054 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:30:11,054 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:30:11,054 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [31] [2019-01-11 14:30:11,055 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:30:11,055 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:30:11,059 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:30:11,059 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. [2019-01-11 14:30:11,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:30:11,059 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:30:11,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:30:11,059 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:30:11,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:30:11,074 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:30:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:30:11,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:30:11,175 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 14:30:11,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,180 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 [2019-01-11 14:30:11,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,185 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 [2019-01-11 14:30:11,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,225 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-01-11 14:30:11,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,234 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 [2019-01-11 14:30:11,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,245 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 [2019-01-11 14:30:11,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,261 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 [2019-01-11 14:30:11,262 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:30:11,322 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:30:11,358 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:30:11,387 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:30:11,409 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:30:11,429 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:30:11,449 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:30:11,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,503 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-01-11 14:30:11,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,559 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 [2019-01-11 14:30:11,562 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 [2019-01-11 14:30:11,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,569 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 [2019-01-11 14:30:11,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,629 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 [2019-01-11 14:30:11,630 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 14:30:11,633 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:30:11,635 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:30:11,637 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:30:11,639 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:30:11,671 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. [2019-01-11 14:30:11,671 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:82, output treesize:54 [2019-01-11 14:30:11,788 WARN L181 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2019-01-11 14:30:11,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:11,884 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 [2019-01-11 14:30:11,885 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:30:11,976 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. [2019-01-11 14:30:11,976 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 14:30:12,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:12,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:12,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:12,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:12,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:12,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:12,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:12,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:12,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:12,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:12,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:12,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:12,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:12,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:12,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:12,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:12,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:12,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:12,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:12,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:12,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:12,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:12,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:12,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:12,053 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-11 14:30:12,054 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:30:12,172 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. [2019-01-11 14:30:12,173 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-11 14:30:14,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:30:14,582 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:30:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:30:14,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:30:14,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:30:14,626 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:30:14,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:30:14,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:30:14,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:30:14,627 INFO L87 Difference]: Start difference. First operand 59 states and 313 transitions. Second operand 8 states. [2019-01-11 14:30:43,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:30:43,564 INFO L93 Difference]: Finished difference Result 100 states and 381 transitions. [2019-01-11 14:30:43,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 14:30:43,565 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:30:43,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:30:43,566 INFO L225 Difference]: With dead ends: 100 [2019-01-11 14:30:43,566 INFO L226 Difference]: Without dead ends: 98 [2019-01-11 14:30:43,567 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-11 14:30:43,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-01-11 14:30:43,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2019-01-11 14:30:43,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-01-11 14:30:43,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 342 transitions. [2019-01-11 14:30:43,579 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 342 transitions. Word has length 4 [2019-01-11 14:30:43,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:30:43,580 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 342 transitions. [2019-01-11 14:30:43,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:30:43,580 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 342 transitions. [2019-01-11 14:30:43,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:30:43,580 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:30:43,580 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:30:43,581 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:30:43,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:30:43,581 INFO L82 PathProgramCache]: Analyzing trace with hash 933968, now seen corresponding path program 1 times [2019-01-11 14:30:43,581 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:30:43,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:30:43,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:30:43,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:30:43,582 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:30:43,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:30:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:30:43,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:30:43,677 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:30:43,677 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:30:43,677 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [31] [2019-01-11 14:30:43,678 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:30:43,678 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:30:43,682 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:30:43,682 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. [2019-01-11 14:30:43,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:30:43,683 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:30:43,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:30:43,683 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:30:43,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:30:43,693 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:30:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:30:43,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:30:43,786 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 14:30:43,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:43,824 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-01-11 14:30:43,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:43,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:43,858 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 [2019-01-11 14:30:43,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:43,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:43,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:43,864 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 [2019-01-11 14:30:43,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:43,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:43,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:43,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:43,874 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 [2019-01-11 14:30:43,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:43,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:43,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:43,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:43,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:43,883 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 [2019-01-11 14:30:43,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:43,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:43,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:43,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:43,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:43,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:43,896 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 [2019-01-11 14:30:43,897 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:30:43,952 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:30:43,983 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:30:44,008 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:30:44,025 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:30:44,041 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:30:44,055 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:30:44,086 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2019-01-11 14:30:44,086 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-11 14:30:44,114 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. [2019-01-11 14:30:44,115 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:51, output treesize:54 [2019-01-11 14:30:44,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,161 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-01-11 14:30:44,162 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:30:44,250 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. [2019-01-11 14:30:44,250 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 14:30:44,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:30:44,318 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:30:44,319 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 141 [2019-01-11 14:30:44,320 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:30:44,410 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. [2019-01-11 14:30:44,410 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-11 14:30:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:30:46,832 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:30:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:30:46,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:30:46,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:30:46,871 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:30:46,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:30:46,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:30:46,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:30:46,872 INFO L87 Difference]: Start difference. First operand 65 states and 342 transitions. Second operand 8 states. [2019-01-11 14:31:12,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:31:12,733 INFO L93 Difference]: Finished difference Result 101 states and 390 transitions. [2019-01-11 14:31:12,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 14:31:12,734 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:31:12,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:31:12,735 INFO L225 Difference]: With dead ends: 101 [2019-01-11 14:31:12,736 INFO L226 Difference]: Without dead ends: 99 [2019-01-11 14:31:12,736 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 [2019-01-11 14:31:12,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-11 14:31:12,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2019-01-11 14:31:12,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-01-11 14:31:12,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 350 transitions. [2019-01-11 14:31:12,747 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 350 transitions. Word has length 4 [2019-01-11 14:31:12,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:31:12,748 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 350 transitions. [2019-01-11 14:31:12,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:31:12,748 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 350 transitions. [2019-01-11 14:31:12,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:31:12,748 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:31:12,749 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:31:12,749 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:31:12,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:31:12,749 INFO L82 PathProgramCache]: Analyzing trace with hash 934030, now seen corresponding path program 1 times [2019-01-11 14:31:12,749 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:31:12,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:31:12,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:31:12,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:31:12,750 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:31:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:31:12,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:31:12,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:31:12,859 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:31:12,859 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:31:12,859 INFO L207 CegarAbsIntRunner]: [0], [10], [28], [31] [2019-01-11 14:31:12,860 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:31:12,861 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:31:12,864 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:31:12,864 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. [2019-01-11 14:31:12,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:31:12,865 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:31:12,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:31:12,865 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:31:12,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:31:12,875 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:31:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:31:12,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:31:13,020 WARN L181 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2019-01-11 14:31:13,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,026 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 [2019-01-11 14:31:13,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,054 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 [2019-01-11 14:31:13,058 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 [2019-01-11 14:31:13,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,064 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 [2019-01-11 14:31:13,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,137 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 [2019-01-11 14:31:13,138 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-11 14:31:13,140 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:31:13,142 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:31:13,144 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:31:13,146 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:31:13,163 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 [2019-01-11 14:31:13,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,188 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-01-11 14:31:13,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,191 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2019-01-11 14:31:13,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,199 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 [2019-01-11 14:31:13,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,208 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-01-11 14:31:13,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,217 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 [2019-01-11 14:31:13,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,248 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-11 14:31:13,249 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 14:31:13,305 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:31:13,341 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:31:13,492 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:31:13,511 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:31:13,526 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:31:13,540 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:31:13,568 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. [2019-01-11 14:31:13,568 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:82, output treesize:54 [2019-01-11 14:31:13,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,619 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-01-11 14:31:13,620 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:31:13,706 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:31:13,706 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 14:31:13,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:13,932 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 [2019-01-11 14:31:13,932 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:31:14,021 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. [2019-01-11 14:31:14,021 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-11 14:31:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:31:16,433 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:31:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:31:16,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:31:16,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:31:16,474 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:31:16,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:31:16,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:31:16,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:31:16,474 INFO L87 Difference]: Start difference. First operand 66 states and 350 transitions. Second operand 8 states. [2019-01-11 14:31:42,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:31:42,155 INFO L93 Difference]: Finished difference Result 105 states and 409 transitions. [2019-01-11 14:31:42,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 14:31:42,156 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:31:42,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:31:42,157 INFO L225 Difference]: With dead ends: 105 [2019-01-11 14:31:42,157 INFO L226 Difference]: Without dead ends: 101 [2019-01-11 14:31:42,158 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 [2019-01-11 14:31:42,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-01-11 14:31:42,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 72. [2019-01-11 14:31:42,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-01-11 14:31:42,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 372 transitions. [2019-01-11 14:31:42,171 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 372 transitions. Word has length 4 [2019-01-11 14:31:42,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:31:42,171 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 372 transitions. [2019-01-11 14:31:42,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:31:42,171 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 372 transitions. [2019-01-11 14:31:42,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:31:42,172 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:31:42,172 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:31:42,172 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:31:42,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:31:42,172 INFO L82 PathProgramCache]: Analyzing trace with hash 933596, now seen corresponding path program 1 times [2019-01-11 14:31:42,173 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:31:42,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:31:42,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:31:42,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:31:42,173 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:31:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:31:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:31:42,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:31:42,258 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:31:42,258 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:31:42,259 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [31] [2019-01-11 14:31:42,259 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:31:42,259 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:31:42,264 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:31:42,264 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. [2019-01-11 14:31:42,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:31:42,264 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:31:42,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:31:42,264 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:31:42,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:31:42,274 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:31:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:31:42,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:31:42,383 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 [2019-01-11 14:31:42,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,388 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 [2019-01-11 14:31:42,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,392 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 [2019-01-11 14:31:42,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,418 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 [2019-01-11 14:31:42,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,428 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-11 14:31:42,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,438 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 [2019-01-11 14:31:42,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,449 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 [2019-01-11 14:31:42,450 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:31:42,509 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:31:42,542 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:31:42,569 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:31:42,590 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:31:42,609 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:31:42,627 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:31:42,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,676 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 [2019-01-11 14:31:42,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,705 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 [2019-01-11 14:31:42,709 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 [2019-01-11 14:31:42,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,715 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-01-11 14:31:42,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,770 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 [2019-01-11 14:31:42,771 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 14:31:42,773 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:31:42,775 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:31:42,777 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:31:42,779 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:31:42,807 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. [2019-01-11 14:31:42,807 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:82, output treesize:54 [2019-01-11 14:31:42,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,854 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 [2019-01-11 14:31:42,854 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:31:42,940 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. [2019-01-11 14:31:42,940 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 14:31:42,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:31:42,994 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 [2019-01-11 14:31:42,995 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:31:43,083 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. [2019-01-11 14:31:43,084 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-11 14:31:45,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:31:45,489 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:31:45,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:31:45,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:31:45,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:31:45,531 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:31:45,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:31:45,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:31:45,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:31:45,532 INFO L87 Difference]: Start difference. First operand 72 states and 372 transitions. Second operand 8 states. [2019-01-11 14:32:01,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:32:01,232 INFO L93 Difference]: Finished difference Result 104 states and 422 transitions. [2019-01-11 14:32:01,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 14:32:01,232 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:32:01,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:32:01,234 INFO L225 Difference]: With dead ends: 104 [2019-01-11 14:32:01,234 INFO L226 Difference]: Without dead ends: 102 [2019-01-11 14:32:01,234 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 [2019-01-11 14:32:01,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-01-11 14:32:01,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2019-01-11 14:32:01,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-01-11 14:32:01,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 387 transitions. [2019-01-11 14:32:01,247 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 387 transitions. Word has length 4 [2019-01-11 14:32:01,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:32:01,247 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 387 transitions. [2019-01-11 14:32:01,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:32:01,248 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 387 transitions. [2019-01-11 14:32:01,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:32:01,248 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:32:01,248 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:32:01,249 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:32:01,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:32:01,249 INFO L82 PathProgramCache]: Analyzing trace with hash 949406, now seen corresponding path program 1 times [2019-01-11 14:32:01,249 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:32:01,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:32:01,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:32:01,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:32:01,250 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:32:01,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:32:01,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:32:01,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:32:01,323 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:32:01,324 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:32:01,324 INFO L207 CegarAbsIntRunner]: [0], [26], [28], [31] [2019-01-11 14:32:01,324 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:32:01,324 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:32:01,327 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:32:01,328 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. [2019-01-11 14:32:01,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:32:01,328 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:32:01,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:32:01,329 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:32:01,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:32:01,338 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:32:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:32:01,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:32:01,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,439 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 [2019-01-11 14:32:01,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,469 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 [2019-01-11 14:32:01,473 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-01-11 14:32:01,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,484 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-01-11 14:32:01,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,558 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 [2019-01-11 14:32:01,559 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-11 14:32:01,561 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:32:01,563 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:32:01,564 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:32:01,566 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:32:01,596 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 [2019-01-11 14:32:01,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,601 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 [2019-01-11 14:32:01,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,607 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 [2019-01-11 14:32:01,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,611 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 [2019-01-11 14:32:01,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,621 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 [2019-01-11 14:32:01,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,632 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 [2019-01-11 14:32:01,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,645 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 [2019-01-11 14:32:01,646 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 14:32:01,701 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:32:01,732 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:32:01,756 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:32:01,775 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:32:01,790 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:32:01,804 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:32:01,832 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. [2019-01-11 14:32:01,832 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:82, output treesize:54 [2019-01-11 14:32:01,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:01,882 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 [2019-01-11 14:32:01,882 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:32:01,972 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. [2019-01-11 14:32:01,972 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 14:32:02,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:02,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:02,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:02,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:02,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:02,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:02,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:02,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:02,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:02,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:02,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:02,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:02,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:02,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:02,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:02,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:02,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:02,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:02,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:02,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:02,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:02,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:02,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:02,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:02,194 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 [2019-01-11 14:32:02,195 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:32:02,285 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. [2019-01-11 14:32:02,285 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-11 14:32:04,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:32:04,695 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:32:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:32:04,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:32:04,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:32:04,742 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:32:04,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:32:04,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:32:04,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:32:04,743 INFO L87 Difference]: Start difference. First operand 74 states and 387 transitions. Second operand 8 states. [2019-01-11 14:32:34,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:32:34,623 INFO L93 Difference]: Finished difference Result 114 states and 447 transitions. [2019-01-11 14:32:34,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 14:32:34,624 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:32:34,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:32:34,626 INFO L225 Difference]: With dead ends: 114 [2019-01-11 14:32:34,626 INFO L226 Difference]: Without dead ends: 111 [2019-01-11 14:32:34,626 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 [2019-01-11 14:32:34,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-01-11 14:32:34,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 81. [2019-01-11 14:32:34,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-01-11 14:32:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 411 transitions. [2019-01-11 14:32:34,638 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 411 transitions. Word has length 4 [2019-01-11 14:32:34,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:32:34,639 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 411 transitions. [2019-01-11 14:32:34,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:32:34,639 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 411 transitions. [2019-01-11 14:32:34,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:32:34,639 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:32:34,639 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:32:34,640 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:32:34,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:32:34,640 INFO L82 PathProgramCache]: Analyzing trace with hash 948972, now seen corresponding path program 1 times [2019-01-11 14:32:34,640 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:32:34,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:32:34,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:32:34,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:32:34,641 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:32:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:32:34,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:32:34,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:32:34,739 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:32:34,739 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:32:34,739 INFO L207 CegarAbsIntRunner]: [0], [14], [26], [31] [2019-01-11 14:32:34,739 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:32:34,740 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:32:34,742 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:32:34,742 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. [2019-01-11 14:32:34,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:32:34,742 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:32:34,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:32:34,742 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:32:34,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:32:34,751 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:32:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:32:34,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:32:34,850 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-11 14:32:34,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:34,854 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 [2019-01-11 14:32:34,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:34,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:34,862 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 [2019-01-11 14:32:34,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:34,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:34,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:34,869 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 [2019-01-11 14:32:34,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:34,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:34,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:34,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:34,879 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 [2019-01-11 14:32:34,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:34,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:34,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:34,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:34,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:34,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-01-11 14:32:34,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:34,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:34,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:34,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:34,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:34,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:34,901 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 [2019-01-11 14:32:34,901 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:32:34,959 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:32:34,997 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:32:35,024 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:32:35,045 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:32:35,063 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:32:35,077 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:32:35,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,124 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 [2019-01-11 14:32:35,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,152 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 [2019-01-11 14:32:35,172 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-01-11 14:32:35,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,179 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 [2019-01-11 14:32:35,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,231 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 [2019-01-11 14:32:35,232 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 14:32:35,234 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:32:35,236 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:32:35,238 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:32:35,240 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:32:35,268 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. [2019-01-11 14:32:35,269 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:82, output treesize:54 [2019-01-11 14:32:35,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,332 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 [2019-01-11 14:32:35,333 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:32:35,419 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. [2019-01-11 14:32:35,419 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-11 14:32:35,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:32:35,488 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 [2019-01-11 14:32:35,489 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:32:35,578 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. [2019-01-11 14:32:35,578 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-11 14:32:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:32:37,972 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:32:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:32:38,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:32:38,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:32:38,019 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:32:38,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:32:38,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:32:38,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:32:38,020 INFO L87 Difference]: Start difference. First operand 81 states and 411 transitions. Second operand 8 states. [2019-01-11 14:33:03,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:33:03,241 INFO L93 Difference]: Finished difference Result 114 states and 461 transitions. [2019-01-11 14:33:03,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 14:33:03,241 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:33:03,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:33:03,242 INFO L225 Difference]: With dead ends: 114 [2019-01-11 14:33:03,242 INFO L226 Difference]: Without dead ends: 112 [2019-01-11 14:33:03,243 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-11 14:33:03,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-01-11 14:33:03,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 83. [2019-01-11 14:33:03,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-01-11 14:33:03,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 426 transitions. [2019-01-11 14:33:03,258 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 426 transitions. Word has length 4 [2019-01-11 14:33:03,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:33:03,258 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 426 transitions. [2019-01-11 14:33:03,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:33:03,258 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 426 transitions. [2019-01-11 14:33:03,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:33:03,259 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:33:03,259 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:33:03,259 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:33:03,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:33:03,259 INFO L82 PathProgramCache]: Analyzing trace with hash 951454, now seen corresponding path program 1 times [2019-01-11 14:33:03,260 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:33:03,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:33:03,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:33:03,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:33:03,260 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:33:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:33:03,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:33:03,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:33:03,360 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:33:03,360 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:33:03,360 INFO L207 CegarAbsIntRunner]: [0], [28], [32], [33] [2019-01-11 14:33:03,361 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:33:03,361 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:33:03,364 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:33:03,364 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. [2019-01-11 14:33:03,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:33:03,365 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:33:03,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:33:03,365 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:33:03,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:33:03,373 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:33:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:33:03,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:33:03,410 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 [2019-01-11 14:33:03,413 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 [2019-01-11 14:33:03,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,420 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2019-01-11 14:33:03,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,427 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 53 [2019-01-11 14:33:03,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,442 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2019-01-11 14:33:03,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,453 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 89 [2019-01-11 14:33:03,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,471 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 108 [2019-01-11 14:33:03,471 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:33:03,518 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:03,547 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:03,569 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:03,588 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:03,604 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:03,619 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:03,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,663 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 40 treesize of output 49 [2019-01-11 14:33:03,667 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 [2019-01-11 14:33:03,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,688 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 30 treesize of output 58 [2019-01-11 14:33:03,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 49 [2019-01-11 14:33:03,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,723 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-11 14:33:03,724 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 14:33:03,739 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:03,748 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:03,755 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:03,761 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:03,794 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. [2019-01-11 14:33:03,795 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:82, output treesize:63 [2019-01-11 14:33:03,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:03,848 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 118 [2019-01-11 14:33:03,849 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-11 14:33:04,036 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. [2019-01-11 14:33:04,037 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:73, output treesize:114 [2019-01-11 14:33:05,350 WARN L181 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2019-01-11 14:33:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:33:05,354 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:33:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:33:05,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:33:05,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 14:33:05,403 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:33:05,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 14:33:05,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 14:33:05,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:33:05,404 INFO L87 Difference]: Start difference. First operand 83 states and 426 transitions. Second operand 6 states. [2019-01-11 14:33:06,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:33:06,108 INFO L93 Difference]: Finished difference Result 107 states and 456 transitions. [2019-01-11 14:33:06,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 14:33:06,108 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-11 14:33:06,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:33:06,109 INFO L225 Difference]: With dead ends: 107 [2019-01-11 14:33:06,109 INFO L226 Difference]: Without dead ends: 106 [2019-01-11 14:33:06,110 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 14:33:06,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-01-11 14:33:06,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2019-01-11 14:33:06,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-01-11 14:33:06,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 426 transitions. [2019-01-11 14:33:06,122 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 426 transitions. Word has length 4 [2019-01-11 14:33:06,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:33:06,122 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 426 transitions. [2019-01-11 14:33:06,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 14:33:06,123 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 426 transitions. [2019-01-11 14:33:06,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:33:06,123 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:33:06,123 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:33:06,123 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:33:06,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:33:06,124 INFO L82 PathProgramCache]: Analyzing trace with hash 938000, now seen corresponding path program 1 times [2019-01-11 14:33:06,124 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:33:06,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:33:06,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:33:06,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:33:06,125 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:33:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:33:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:33:06,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:33:06,199 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:33:06,199 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:33:06,199 INFO L207 CegarAbsIntRunner]: [0], [14], [32], [33] [2019-01-11 14:33:06,200 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:33:06,200 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:33:06,202 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:33:06,202 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. [2019-01-11 14:33:06,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:33:06,203 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:33:06,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:33:06,203 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:33:06,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:33:06,214 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:33:06,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:33:06,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:33:06,284 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 [2019-01-11 14:33:06,287 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-11 14:33:06,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,293 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 [2019-01-11 14:33:06,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,300 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 53 [2019-01-11 14:33:06,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,309 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2019-01-11 14:33:06,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,323 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 89 [2019-01-11 14:33:06,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,339 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 108 [2019-01-11 14:33:06,340 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:33:06,388 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:06,418 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:06,440 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:06,459 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:06,475 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:06,490 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:06,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,537 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-01-11 14:33:06,540 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 [2019-01-11 14:33:06,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,560 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 30 treesize of output 58 [2019-01-11 14:33:06,565 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 49 [2019-01-11 14:33:06,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,593 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-11 14:33:06,593 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 14:33:06,611 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:06,621 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:06,629 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:06,635 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:06,667 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. [2019-01-11 14:33:06,667 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:82, output treesize:63 [2019-01-11 14:33:06,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:06,720 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 118 [2019-01-11 14:33:06,721 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-11 14:33:06,910 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. [2019-01-11 14:33:06,911 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:73, output treesize:122 [2019-01-11 14:33:08,020 WARN L181 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2019-01-11 14:33:08,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:33:08,023 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:33:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:33:08,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:33:08,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 14:33:08,052 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:33:08,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 14:33:08,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 14:33:08,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:33:08,053 INFO L87 Difference]: Start difference. First operand 83 states and 426 transitions. Second operand 6 states. [2019-01-11 14:33:08,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:33:08,580 INFO L93 Difference]: Finished difference Result 107 states and 456 transitions. [2019-01-11 14:33:08,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 14:33:08,580 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-11 14:33:08,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:33:08,581 INFO L225 Difference]: With dead ends: 107 [2019-01-11 14:33:08,581 INFO L226 Difference]: Without dead ends: 106 [2019-01-11 14:33:08,582 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 14:33:08,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-01-11 14:33:08,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2019-01-11 14:33:08,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-01-11 14:33:08,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 426 transitions. [2019-01-11 14:33:08,596 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 426 transitions. Word has length 4 [2019-01-11 14:33:08,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:33:08,596 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 426 transitions. [2019-01-11 14:33:08,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 14:33:08,596 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 426 transitions. [2019-01-11 14:33:08,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-11 14:33:08,597 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:33:08,597 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-11 14:33:08,597 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:33:08,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:33:08,597 INFO L82 PathProgramCache]: Analyzing trace with hash 29172180, now seen corresponding path program 1 times [2019-01-11 14:33:08,598 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:33:08,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:33:08,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:33:08,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:33:08,599 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:33:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:33:08,769 WARN L181 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 17 [2019-01-11 14:33:08,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:33:08,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:33:08,796 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:33:08,797 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-11 14:33:08,797 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [32], [33] [2019-01-11 14:33:08,798 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:33:08,798 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:33:08,801 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:33:08,801 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 90 root evaluator evaluations with a maximum evaluation depth of 3. Performed 90 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 14:33:08,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:33:08,802 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:33:08,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:33:08,802 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:33:08,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:33:08,812 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:33:08,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:33:08,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:33:08,862 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 [2019-01-11 14:33:08,865 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 [2019-01-11 14:33:08,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:08,872 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 [2019-01-11 14:33:08,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:08,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:08,884 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 [2019-01-11 14:33:08,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:08,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:08,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:08,893 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 [2019-01-11 14:33:08,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:08,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:08,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:08,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:08,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:08,910 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 [2019-01-11 14:33:08,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:08,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:08,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:08,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:08,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:08,922 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 [2019-01-11 14:33:08,923 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:33:08,992 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:09,020 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:09,040 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:09,059 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:09,074 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:09,090 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:09,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,129 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 [2019-01-11 14:33:09,132 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2019-01-11 14:33:09,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,136 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2019-01-11 14:33:09,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,144 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 [2019-01-11 14:33:09,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,173 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 [2019-01-11 14:33:09,174 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-11 14:33:09,188 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:09,194 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:09,198 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:09,203 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:33:09,231 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. [2019-01-11 14:33:09,231 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:68, output treesize:59 [2019-01-11 14:33:09,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,295 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 2 case distinctions, treesize of input 46 treesize of output 108 [2019-01-11 14:33:09,296 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-11 14:33:09,464 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2019-01-11 14:33:09,465 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:69, output treesize:108 [2019-01-11 14:33:09,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,652 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:33:09,653 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 58 treesize of output 112 [2019-01-11 14:33:09,654 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:33:09,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:33:09,848 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 153 [2019-01-11 14:33:09,852 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 8 xjuncts. [2019-01-11 14:33:10,301 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 2 dim-1 vars, End of recursive call: 26 dim-0 vars, and 5 xjuncts. [2019-01-11 14:33:10,302 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 13 variables, input treesize:130, output treesize:244 [2019-01-11 14:33:19,787 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:33:19,789 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:8192 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. 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 [2019-01-11 14:33:19,794 INFO L168 Benchmark]: Toolchain (without parser) took 612216.80 ms. Allocated memory was 136.8 MB in the beginning and 211.3 MB in the end (delta: 74.4 MB). Free memory was 106.2 MB in the beginning and 74.9 MB in the end (delta: 31.4 MB). Peak memory consumption was 105.8 MB. Max. memory is 7.1 GB. [2019-01-11 14:33:19,794 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 136.8 MB. Free memory is still 107.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-11 14:33:19,794 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.48 ms. Allocated memory is still 136.8 MB. Free memory was 106.0 MB in the beginning and 103.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2019-01-11 14:33:19,795 INFO L168 Benchmark]: Boogie Preprocessor took 35.61 ms. Allocated memory is still 136.8 MB. Free memory was 103.7 MB in the beginning and 102.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-01-11 14:33:19,795 INFO L168 Benchmark]: RCFGBuilder took 444.67 ms. Allocated memory is still 136.8 MB. Free memory was 102.4 MB in the beginning and 89.8 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2019-01-11 14:33:19,795 INFO L168 Benchmark]: TraceAbstraction took 611666.20 ms. Allocated memory was 136.8 MB in the beginning and 211.3 MB in the end (delta: 74.4 MB). Free memory was 89.6 MB in the beginning and 74.9 MB in the end (delta: 14.8 MB). Peak memory consumption was 89.2 MB. Max. memory is 7.1 GB. [2019-01-11 14:33:19,797 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 0.19 ms. Allocated memory is still 136.8 MB. Free memory is still 107.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 65.48 ms. Allocated memory is still 136.8 MB. Free memory was 106.0 MB in the beginning and 103.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.61 ms. Allocated memory is still 136.8 MB. Free memory was 103.7 MB in the beginning and 102.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 444.67 ms. Allocated memory is still 136.8 MB. Free memory was 102.4 MB in the beginning and 89.8 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 611666.20 ms. Allocated memory was 136.8 MB in the beginning and 211.3 MB in the end (delta: 74.4 MB). Free memory was 89.6 MB in the beginning and 74.9 MB in the end (delta: 14.8 MB). Peak memory consumption was 89.2 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:8192 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000)Received EOF on stdin. No stderr output.: 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...