java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-e1a14da [2018-12-24 14:29:50,091 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-24 14:29:50,093 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-24 14:29:50,105 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-24 14:29:50,106 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-24 14:29:50,107 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-24 14:29:50,108 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-24 14:29:50,110 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-24 14:29:50,112 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-24 14:29:50,113 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-24 14:29:50,114 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-12-24 14:29:50,155 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf [2018-12-24 14:29:50,174 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-24 14:29:50,174 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-24 14:29:50,175 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-24 14:29:50,175 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-24 14:29:50,176 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-24 14:29:50,176 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-24 14:29:50,176 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2018-12-24 14:29:50,176 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-24 14:29:50,176 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-24 14:29:50,177 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2018-12-24 14:29:50,177 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-24 14:29:50,177 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-24 14:29:50,177 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-24 14:29:50,178 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-24 14:29:50,178 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-24 14:29:50,178 INFO L133 SettingsManager]: * Use SBE=true [2018-12-24 14:29:50,178 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-24 14:29:50,179 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-24 14:29:50,179 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-24 14:29:50,179 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-24 14:29:50,179 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-24 14:29:50,179 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-24 14:29:50,180 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-24 14:29:50,180 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-24 14:29:50,180 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-24 14:29:50,180 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-24 14:29:50,180 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-24 14:29:50,181 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-24 14:29:50,181 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-24 14:29:50,181 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-24 14:29:50,181 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-24 14:29:50,181 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-24 14:29:50,182 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-24 14:29:50,182 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-24 14:29:50,182 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-24 14:29:50,182 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-24 14:29:50,182 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-24 14:29:50,183 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-24 14:29:50,183 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-24 14:29:50,213 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-24 14:29:50,226 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-24 14:29:50,230 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-24 14:29:50,231 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-24 14:29:50,232 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-24 14:29:50,233 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-unlimited.bpl [2018-12-24 14:29:50,233 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-unlimited.bpl' [2018-12-24 14:29:50,270 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-24 14:29:50,272 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-24 14:29:50,273 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-24 14:29:50,273 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-24 14:29:50,273 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-24 14:29:50,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:29:50" (1/1) ... [2018-12-24 14:29:50,305 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:29:50" (1/1) ... [2018-12-24 14:29:50,334 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-24 14:29:50,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-24 14:29:50,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-24 14:29:50,335 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-24 14:29:50,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:29:50" (1/1) ... [2018-12-24 14:29:50,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:29:50" (1/1) ... [2018-12-24 14:29:50,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:29:50" (1/1) ... [2018-12-24 14:29:50,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:29:50" (1/1) ... [2018-12-24 14:29:50,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:29:50" (1/1) ... [2018-12-24 14:29:50,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:29:50" (1/1) ... [2018-12-24 14:29:50,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:29:50" (1/1) ... [2018-12-24 14:29:50,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-24 14:29:50,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-24 14:29:50,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-24 14:29:50,364 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-24 14:29:50,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:29:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-24 14:29:50,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-24 14:29:50,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-24 14:29:50,846 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-24 14:29:50,847 INFO L280 CfgBuilder]: Removed 17 assue(true) statements. [2018-12-24 14:29:50,847 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 02:29:50 BoogieIcfgContainer [2018-12-24 14:29:50,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-24 14:29:50,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-24 14:29:50,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-24 14:29:50,853 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-24 14:29:50,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:29:50" (1/2) ... [2018-12-24 14:29:50,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d78cf8e and model type speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.12 02:29:50, skipping insertion in model container [2018-12-24 14:29:50,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 02:29:50" (2/2) ... [2018-12-24 14:29:50,857 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-7-unlimited.bpl [2018-12-24 14:29:50,870 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-24 14:29:50,880 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2018-12-24 14:29:50,917 INFO L257 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2018-12-24 14:29:50,970 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-24 14:29:50,970 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-24 14:29:50,970 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-24 14:29:50,970 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-24 14:29:50,970 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-24 14:29:50,971 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-24 14:29:50,971 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-24 14:29:50,972 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-24 14:29:50,985 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2018-12-24 14:29:50,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-12-24 14:29:50,992 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:29:50,993 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2018-12-24 14:29:50,995 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:29:51,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:51,002 INFO L82 PathProgramCache]: Analyzing trace with hash 992, now seen corresponding path program 1 times [2018-12-24 14:29:51,004 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:29:51,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:51,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:51,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:51,051 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:29:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:51,243 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 14:29:51,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-12-24 14:29:51,244 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:29:51,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-24 14:29:51,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-24 14:29:51,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 14:29:51,273 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2018-12-24 14:29:51,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:29:51,522 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2018-12-24 14:29:51,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 14:29:51,524 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-12-24 14:29:51,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:29:51,539 INFO L225 Difference]: With dead ends: 33 [2018-12-24 14:29:51,539 INFO L226 Difference]: Without dead ends: 28 [2018-12-24 14:29:51,543 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 14:29:51,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-24 14:29:51,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 16. [2018-12-24 14:29:51,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-24 14:29:51,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 29 transitions. [2018-12-24 14:29:51,582 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 29 transitions. Word has length 2 [2018-12-24 14:29:51,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:29:51,583 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 29 transitions. [2018-12-24 14:29:51,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-24 14:29:51,584 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 29 transitions. [2018-12-24 14:29:51,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 14:29:51,584 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:29:51,584 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 14:29:51,585 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:29:51,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:51,585 INFO L82 PathProgramCache]: Analyzing trace with hash 30816, now seen corresponding path program 1 times [2018-12-24 14:29:51,586 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:29:51,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:51,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:51,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:51,587 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:29:51,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:51,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:51,658 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 14:29:51,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-12-24 14:29:51,658 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:29:51,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-24 14:29:51,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-24 14:29:51,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 14:29:51,662 INFO L87 Difference]: Start difference. First operand 16 states and 29 transitions. Second operand 3 states. [2018-12-24 14:29:52,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:29:52,004 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2018-12-24 14:29:52,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 14:29:52,005 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-24 14:29:52,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:29:52,006 INFO L225 Difference]: With dead ends: 28 [2018-12-24 14:29:52,006 INFO L226 Difference]: Without dead ends: 27 [2018-12-24 14:29:52,007 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 14:29:52,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-24 14:29:52,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2018-12-24 14:29:52,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-24 14:29:52,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 30 transitions. [2018-12-24 14:29:52,018 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 30 transitions. Word has length 3 [2018-12-24 14:29:52,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:29:52,018 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 30 transitions. [2018-12-24 14:29:52,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-24 14:29:52,019 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 30 transitions. [2018-12-24 14:29:52,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 14:29:52,019 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:29:52,020 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 14:29:52,020 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:29:52,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:52,021 INFO L82 PathProgramCache]: Analyzing trace with hash 30380, now seen corresponding path program 1 times [2018-12-24 14:29:52,021 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:29:52,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:52,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:52,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:52,023 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:29:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:52,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:52,161 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:29:52,162 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 14:29:52,163 INFO L207 CegarAbsIntRunner]: [0], [18], [31] [2018-12-24 14:29:52,219 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:29:52,219 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:29:53,540 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:29:53,542 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:29:53,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:53,549 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:29:53,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:53,549 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:29:53,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:53,566 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:29:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:53,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:29:53,852 WARN L181 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-12-24 14:29:53,902 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:53,913 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:29:54,065 WARN L181 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2018-12-24 14:29:54,109 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:54,127 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:54,129 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:29:54,250 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:54,252 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:54,255 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:54,259 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:54,261 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:29:54,518 WARN L181 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2018-12-24 14:29:54,560 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:54,577 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:54,599 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:54,622 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:54,637 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:54,643 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:54,644 INFO L303 Elim1Store]: Index analysis took 123 ms [2018-12-24 14:29:54,646 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:29:55,101 WARN L181 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2018-12-24 14:29:55,142 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,169 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,193 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,204 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,205 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,212 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,212 INFO L303 Elim1Store]: Index analysis took 109 ms [2018-12-24 14:29:55,213 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:29:55,215 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:55,269 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:55,314 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:55,358 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:55,402 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:55,470 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:29:55,480 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:29:55,504 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:29:55,518 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:29:55,537 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:29:55,552 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 [2018-12-24 14:29:55,700 INFO L303 Elim1Store]: Index analysis took 143 ms [2018-12-24 14:29:55,702 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:29:55,703 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:55,931 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:56,009 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:56,117 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:56,150 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:56,167 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:56,184 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:56,269 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:56,269 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2018-12-24 14:29:56,375 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:56,377 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:29:56,378 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:56,513 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:56,514 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2018-12-24 14:29:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:56,541 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:29:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:56,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:29:56,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:29:56,628 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:29:56,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:29:56,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:29:56,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:29:56,630 INFO L87 Difference]: Start difference. First operand 17 states and 30 transitions. Second operand 6 states. [2018-12-24 14:29:57,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:29:57,002 INFO L93 Difference]: Finished difference Result 54 states and 79 transitions. [2018-12-24 14:29:57,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:29:57,005 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 14:29:57,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:29:57,006 INFO L225 Difference]: With dead ends: 54 [2018-12-24 14:29:57,006 INFO L226 Difference]: Without dead ends: 52 [2018-12-24 14:29:57,007 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:29:57,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-12-24 14:29:57,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 20. [2018-12-24 14:29:57,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-24 14:29:57,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 41 transitions. [2018-12-24 14:29:57,014 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 41 transitions. Word has length 3 [2018-12-24 14:29:57,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:29:57,015 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 41 transitions. [2018-12-24 14:29:57,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:29:57,015 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 41 transitions. [2018-12-24 14:29:57,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 14:29:57,015 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:29:57,016 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 14:29:57,016 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:29:57,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:57,017 INFO L82 PathProgramCache]: Analyzing trace with hash 30008, now seen corresponding path program 1 times [2018-12-24 14:29:57,017 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:29:57,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:57,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:57,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:57,018 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:29:57,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:57,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:57,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:57,110 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:29:57,111 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 14:29:57,111 INFO L207 CegarAbsIntRunner]: [0], [6], [31] [2018-12-24 14:29:57,114 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:29:57,114 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:29:57,644 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:29:57,645 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:29:57,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:57,645 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:29:57,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:57,645 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:29:57,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:57,660 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:29:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:57,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:29:57,887 WARN L181 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-12-24 14:29:57,901 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 [2018-12-24 14:29:57,917 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2018-12-24 14:29:57,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,978 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,979 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 [2018-12-24 14:29:58,004 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,006 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,009 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,010 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 [2018-12-24 14:29:58,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,024 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,025 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,026 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,027 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2018-12-24 14:29:58,071 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,096 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,142 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,166 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,167 INFO L303 Elim1Store]: Index analysis took 136 ms [2018-12-24 14:29:58,168 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 [2018-12-24 14:29:58,318 INFO L303 Elim1Store]: Index analysis took 146 ms [2018-12-24 14:29:58,320 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:29:58,321 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:58,380 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:58,418 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:58,491 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:58,513 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:58,536 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:58,553 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:58,593 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,595 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:29:58,637 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,638 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,639 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:29:58,694 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,696 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,697 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,699 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,700 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:29:58,763 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,764 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,765 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,767 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,769 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,770 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,771 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:29:59,249 WARN L181 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2018-12-24 14:29:59,253 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:59,254 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:59,255 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:59,256 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:59,257 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:59,258 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:59,260 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:59,261 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:59,263 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:29:59,264 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:59,293 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:59,324 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:59,354 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:59,395 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:59,472 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. [2018-12-24 14:29:59,473 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 8 variables, input treesize:95, output treesize:96 [2018-12-24 14:29:59,675 WARN L181 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2018-12-24 14:29:59,706 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:59,708 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:29:59,709 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:59,784 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:59,785 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2018-12-24 14:29:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:59,802 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:29:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:59,827 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-24 14:29:59,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2018-12-24 14:29:59,827 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:29:59,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 14:29:59,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 14:29:59,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 14:29:59,828 INFO L87 Difference]: Start difference. First operand 20 states and 41 transitions. Second operand 4 states. [2018-12-24 14:29:59,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:29:59,907 INFO L93 Difference]: Finished difference Result 25 states and 67 transitions. [2018-12-24 14:29:59,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-24 14:29:59,908 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-12-24 14:29:59,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:29:59,909 INFO L225 Difference]: With dead ends: 25 [2018-12-24 14:29:59,909 INFO L226 Difference]: Without dead ends: 24 [2018-12-24 14:29:59,910 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 14:29:59,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-24 14:29:59,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-12-24 14:29:59,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-24 14:29:59,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 66 transitions. [2018-12-24 14:29:59,919 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 66 transitions. Word has length 3 [2018-12-24 14:29:59,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:29:59,919 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 66 transitions. [2018-12-24 14:29:59,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 14:29:59,919 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 66 transitions. [2018-12-24 14:29:59,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 14:29:59,920 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:29:59,920 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 14:29:59,920 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:29:59,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:59,920 INFO L82 PathProgramCache]: Analyzing trace with hash 30132, now seen corresponding path program 1 times [2018-12-24 14:29:59,921 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:29:59,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:59,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:59,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:59,922 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:29:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:00,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:00,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:00,028 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:00,028 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 14:30:00,029 INFO L207 CegarAbsIntRunner]: [0], [10], [31] [2018-12-24 14:30:00,031 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:00,031 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:00,395 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:00,395 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:30:00,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:00,396 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:00,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:00,396 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:30:00,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:00,414 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:00,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:00,643 WARN L181 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-12-24 14:30:00,654 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 [2018-12-24 14:30:00,675 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2018-12-24 14:30:00,714 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:00,737 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:00,738 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 [2018-12-24 14:30:00,778 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:00,780 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:00,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:00,783 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2018-12-24 14:30:00,803 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:00,805 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:00,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:00,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:00,810 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 [2018-12-24 14:30:00,819 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:00,822 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:00,824 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:00,826 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:00,828 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:00,829 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:30:00,871 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:30:00,873 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:00,960 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:00,993 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:01,021 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:01,045 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:01,064 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:01,082 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:01,123 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,124 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 68 treesize of output 71 [2018-12-24 14:30:01,165 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,167 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,168 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:30:01,229 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,230 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,232 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,236 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,237 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:30:01,294 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,295 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,296 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,296 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,297 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,298 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,300 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:30:01,365 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,367 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,370 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,372 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,373 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,374 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,375 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:30:01,376 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:01,401 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:01,427 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:01,454 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:01,481 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:01,534 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:01,535 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2018-12-24 14:30:01,573 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,574 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:30:01,576 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:01,621 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:01,621 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2018-12-24 14:30:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:01,751 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:01,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:01,787 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:01,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:30:01,787 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:01,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:30:01,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:30:01,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:30:01,788 INFO L87 Difference]: Start difference. First operand 23 states and 66 transitions. Second operand 6 states. [2018-12-24 14:30:02,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:02,096 INFO L93 Difference]: Finished difference Result 57 states and 111 transitions. [2018-12-24 14:30:02,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:30:02,096 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 14:30:02,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:02,098 INFO L225 Difference]: With dead ends: 57 [2018-12-24 14:30:02,099 INFO L226 Difference]: Without dead ends: 56 [2018-12-24 14:30:02,099 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:30:02,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-12-24 14:30:02,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 25. [2018-12-24 14:30:02,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-24 14:30:02,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 82 transitions. [2018-12-24 14:30:02,108 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 82 transitions. Word has length 3 [2018-12-24 14:30:02,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:02,108 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 82 transitions. [2018-12-24 14:30:02,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:30:02,108 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 82 transitions. [2018-12-24 14:30:02,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 14:30:02,109 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:02,109 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 14:30:02,109 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:02,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:02,110 INFO L82 PathProgramCache]: Analyzing trace with hash 30628, now seen corresponding path program 1 times [2018-12-24 14:30:02,110 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:02,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:02,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:02,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:02,111 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:02,163 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:02,164 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:02,164 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 14:30:02,164 INFO L207 CegarAbsIntRunner]: [0], [26], [31] [2018-12-24 14:30:02,166 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:02,166 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:02,504 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:02,504 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:30:02,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:02,505 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:02,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:02,505 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:30:02,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:02,520 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:02,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:02,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:02,590 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 [2018-12-24 14:30:02,594 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 [2018-12-24 14:30:02,599 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,601 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,602 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 [2018-12-24 14:30:02,607 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,609 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,611 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,612 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 [2018-12-24 14:30:02,617 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,618 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,619 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,620 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,622 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 [2018-12-24 14:30:02,631 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,633 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,636 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,638 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,641 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,642 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 [2018-12-24 14:30:02,659 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:30:02,660 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:02,702 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:02,770 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:02,794 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:02,815 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:02,830 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:02,845 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:02,883 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,885 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 68 treesize of output 71 [2018-12-24 14:30:02,920 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,921 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,922 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:30:02,988 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,989 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,989 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,990 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,991 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:30:03,039 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,041 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,041 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,042 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,043 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,044 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,045 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:30:03,111 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,112 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,112 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,115 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,117 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,120 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:30:03,121 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:03,148 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:03,178 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:03,207 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:03,238 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:03,293 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:03,293 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2018-12-24 14:30:03,360 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,362 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:30:03,363 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:03,441 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:03,442 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2018-12-24 14:30:03,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:03,465 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:03,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:03,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:30:03,514 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:03,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:30:03,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:30:03,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:30:03,515 INFO L87 Difference]: Start difference. First operand 25 states and 82 transitions. Second operand 6 states. [2018-12-24 14:30:03,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:03,967 INFO L93 Difference]: Finished difference Result 59 states and 127 transitions. [2018-12-24 14:30:03,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:30:03,969 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 14:30:03,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:03,970 INFO L225 Difference]: With dead ends: 59 [2018-12-24 14:30:03,970 INFO L226 Difference]: Without dead ends: 57 [2018-12-24 14:30:03,971 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:30:03,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-24 14:30:03,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 29. [2018-12-24 14:30:03,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-24 14:30:03,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 101 transitions. [2018-12-24 14:30:03,983 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 101 transitions. Word has length 3 [2018-12-24 14:30:03,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:03,983 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 101 transitions. [2018-12-24 14:30:03,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:30:03,983 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 101 transitions. [2018-12-24 14:30:03,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:30:03,984 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:03,984 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:30:03,984 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:03,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:03,985 INFO L82 PathProgramCache]: Analyzing trace with hash 955362, now seen corresponding path program 1 times [2018-12-24 14:30:03,985 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:03,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:03,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:03,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:03,986 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:04,159 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 14:30:04,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-24 14:30:04,160 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:30:04,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 14:30:04,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 14:30:04,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-24 14:30:04,160 INFO L87 Difference]: Start difference. First operand 29 states and 101 transitions. Second operand 4 states. [2018-12-24 14:30:04,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:04,269 INFO L93 Difference]: Finished difference Result 37 states and 114 transitions. [2018-12-24 14:30:04,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-24 14:30:04,270 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-12-24 14:30:04,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:04,271 INFO L225 Difference]: With dead ends: 37 [2018-12-24 14:30:04,271 INFO L226 Difference]: Without dead ends: 36 [2018-12-24 14:30:04,272 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-24 14:30:04,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-24 14:30:04,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2018-12-24 14:30:04,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-24 14:30:04,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 111 transitions. [2018-12-24 14:30:04,281 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 111 transitions. Word has length 4 [2018-12-24 14:30:04,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:04,281 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 111 transitions. [2018-12-24 14:30:04,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 14:30:04,281 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 111 transitions. [2018-12-24 14:30:04,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:30:04,282 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:04,282 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:30:04,283 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:04,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:04,283 INFO L82 PathProgramCache]: Analyzing trace with hash 941844, now seen corresponding path program 1 times [2018-12-24 14:30:04,283 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:04,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:04,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:04,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:04,284 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:04,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:04,385 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:04,385 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:30:04,386 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [33] [2018-12-24 14:30:04,387 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:04,388 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:04,754 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:04,754 INFO L272 AbstractInterpreter]: Visited 4 different actions 6 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:30:04,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:04,754 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:04,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:04,755 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:30:04,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:04,776 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:04,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:04,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:05,005 WARN L181 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-12-24 14:30:05,032 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:05,033 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:30:05,162 WARN L181 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2018-12-24 14:30:05,167 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:05,167 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:05,168 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:30:05,227 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:05,228 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:05,229 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:05,230 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:05,231 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:30:05,279 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:05,280 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:05,281 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:05,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:05,284 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:05,288 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:05,289 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:30:05,352 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:05,354 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:05,355 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:05,356 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:05,357 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:05,358 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:05,359 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:05,360 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:05,362 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:30:05,363 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:05,395 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:05,421 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:05,449 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:05,475 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:05,511 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:30:05,519 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:30:05,522 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:30:05,524 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:30:05,527 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:30:05,539 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 [2018-12-24 14:30:05,570 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:30:05,571 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:05,612 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:05,641 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:05,701 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:05,719 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:05,734 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:05,748 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:05,889 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:05,890 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2018-12-24 14:30:05,962 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:05,963 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:30:05,964 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:06,038 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:06,039 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2018-12-24 14:30:06,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:06,057 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:06,081 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-24 14:30:06,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2018-12-24 14:30:06,082 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:30:06,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 14:30:06,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 14:30:06,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 14:30:06,083 INFO L87 Difference]: Start difference. First operand 32 states and 111 transitions. Second operand 4 states. [2018-12-24 14:30:06,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:06,136 INFO L93 Difference]: Finished difference Result 36 states and 122 transitions. [2018-12-24 14:30:06,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 14:30:06,137 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-12-24 14:30:06,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:06,138 INFO L225 Difference]: With dead ends: 36 [2018-12-24 14:30:06,138 INFO L226 Difference]: Without dead ends: 35 [2018-12-24 14:30:06,139 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 14:30:06,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-24 14:30:06,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2018-12-24 14:30:06,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-24 14:30:06,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 121 transitions. [2018-12-24 14:30:06,146 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 121 transitions. Word has length 4 [2018-12-24 14:30:06,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:06,146 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 121 transitions. [2018-12-24 14:30:06,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 14:30:06,147 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 121 transitions. [2018-12-24 14:30:06,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:30:06,147 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:06,147 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:30:06,148 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:06,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:06,148 INFO L82 PathProgramCache]: Analyzing trace with hash 941532, now seen corresponding path program 1 times [2018-12-24 14:30:06,148 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:06,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:06,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:06,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:06,149 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:06,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:06,263 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:06,263 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:30:06,263 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [31] [2018-12-24 14:30:06,264 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:06,264 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:06,691 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:06,691 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:30:06,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:06,692 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:06,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:06,692 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:30:06,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:06,711 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:06,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:06,875 WARN L181 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-12-24 14:30:06,881 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 [2018-12-24 14:30:06,884 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 [2018-12-24 14:30:06,889 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:06,890 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:06,891 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 [2018-12-24 14:30:06,894 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:06,895 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:06,897 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:06,898 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2018-12-24 14:30:06,909 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:06,911 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:06,913 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:06,914 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:06,914 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 [2018-12-24 14:30:06,923 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:06,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:06,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:06,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:06,929 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:06,930 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 [2018-12-24 14:30:06,940 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:30:06,941 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:06,982 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:07,013 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:07,038 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:07,058 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:07,076 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:07,092 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:07,133 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,134 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:30:07,180 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,181 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,182 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:30:07,223 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,223 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,224 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,225 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,226 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:30:07,311 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,312 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,313 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,313 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,314 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,315 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,316 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:30:07,398 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,399 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,400 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,401 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,402 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,404 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,407 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:30:07,407 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:07,445 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:07,471 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:07,497 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:07,523 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:07,573 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:07,573 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2018-12-24 14:30:07,623 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,624 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:30:07,625 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:07,879 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:07,879 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:30:08,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,015 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,017 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 105 [2018-12-24 14:30:08,022 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:08,492 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:08,492 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:57 [2018-12-24 14:30:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:08,529 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:08,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:08,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:30:08,572 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:08,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:30:08,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:30:08,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:30:08,573 INFO L87 Difference]: Start difference. First operand 34 states and 121 transitions. Second operand 8 states. [2018-12-24 14:30:09,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:09,125 INFO L93 Difference]: Finished difference Result 79 states and 193 transitions. [2018-12-24 14:30:09,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:30:09,126 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:30:09,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:09,128 INFO L225 Difference]: With dead ends: 79 [2018-12-24 14:30:09,128 INFO L226 Difference]: Without dead ends: 77 [2018-12-24 14:30:09,129 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:30:09,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-12-24 14:30:09,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 41. [2018-12-24 14:30:09,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-24 14:30:09,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 150 transitions. [2018-12-24 14:30:09,137 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 150 transitions. Word has length 4 [2018-12-24 14:30:09,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:09,137 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 150 transitions. [2018-12-24 14:30:09,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:30:09,137 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 150 transitions. [2018-12-24 14:30:09,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:30:09,138 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:09,138 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:30:09,139 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:09,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:09,139 INFO L82 PathProgramCache]: Analyzing trace with hash 941160, now seen corresponding path program 1 times [2018-12-24 14:30:09,139 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:09,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:09,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:09,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:09,140 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:09,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:09,296 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:09,296 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:30:09,296 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [31] [2018-12-24 14:30:09,297 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:09,297 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:09,802 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:09,802 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:30:09,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:09,803 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:09,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:09,803 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:30:09,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:09,842 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:09,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:10,060 WARN L181 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-12-24 14:30:10,062 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 [2018-12-24 14:30:10,068 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2018-12-24 14:30:10,072 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,073 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,074 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2018-12-24 14:30:10,081 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,083 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,085 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,085 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 [2018-12-24 14:30:10,089 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,089 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,090 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,091 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,093 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 [2018-12-24 14:30:10,098 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,100 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,102 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 [2018-12-24 14:30:10,120 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:30:10,121 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:10,176 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:10,207 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:10,232 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:10,250 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:10,265 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:10,282 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:10,316 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,317 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:30:10,355 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,357 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,358 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:30:10,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,404 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,404 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,406 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:30:10,453 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,456 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,457 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,458 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,459 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,460 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:30:10,525 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,526 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,527 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,528 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,529 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,531 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,532 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,533 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,534 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:30:10,534 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:10,559 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:10,584 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:10,609 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:10,635 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:10,684 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:10,684 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2018-12-24 14:30:11,017 WARN L181 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2018-12-24 14:30:11,025 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:11,026 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:30:11,026 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:11,068 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:11,069 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:30:11,117 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:11,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:11,119 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:11,152 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:11,176 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:11,185 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:11,185 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:30:11,186 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2018-12-24 14:30:11,187 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:11,230 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:11,230 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2018-12-24 14:30:11,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:11,248 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:11,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:11,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:11,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:30:11,290 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:11,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:30:11,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:30:11,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:30:11,291 INFO L87 Difference]: Start difference. First operand 41 states and 150 transitions. Second operand 8 states. [2018-12-24 14:30:11,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:11,739 INFO L93 Difference]: Finished difference Result 74 states and 192 transitions. [2018-12-24 14:30:11,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:30:11,739 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:30:11,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:11,741 INFO L225 Difference]: With dead ends: 74 [2018-12-24 14:30:11,741 INFO L226 Difference]: Without dead ends: 73 [2018-12-24 14:30:11,742 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:30:11,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-12-24 14:30:11,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 41. [2018-12-24 14:30:11,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-24 14:30:11,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 150 transitions. [2018-12-24 14:30:11,751 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 150 transitions. Word has length 4 [2018-12-24 14:30:11,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:11,751 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 150 transitions. [2018-12-24 14:30:11,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:30:11,751 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 150 transitions. [2018-12-24 14:30:11,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:30:11,752 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:11,752 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:30:11,752 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:11,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:11,752 INFO L82 PathProgramCache]: Analyzing trace with hash 941656, now seen corresponding path program 1 times [2018-12-24 14:30:11,753 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:11,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:11,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:11,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:11,753 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:11,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:11,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:11,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:11,829 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:11,830 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:30:11,830 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [31] [2018-12-24 14:30:11,833 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:11,833 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:12,171 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:12,172 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:30:12,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:12,172 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:12,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:12,173 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:30:12,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:12,184 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:12,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:12,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:12,221 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:12,222 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 68 treesize of output 71 [2018-12-24 14:30:12,307 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:12,308 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:12,309 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:30:12,350 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:12,352 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:12,353 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:12,354 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:12,355 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:30:12,402 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:12,404 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:12,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:12,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:12,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:12,409 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:12,410 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:30:12,476 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:12,477 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:12,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:12,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:12,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:12,482 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:12,483 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:12,485 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:12,486 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:30:12,486 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:12,511 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:12,582 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:12,665 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:12,693 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:12,729 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:30:12,732 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:30:12,735 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:30:12,742 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:30:12,746 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:30:12,750 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 [2018-12-24 14:30:12,760 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:30:12,761 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:12,799 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:12,827 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:12,850 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:12,871 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:12,886 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:12,901 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:13,065 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:13,065 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2018-12-24 14:30:13,162 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,163 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:30:13,164 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:13,310 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:13,310 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:30:13,349 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,350 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,351 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,353 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,354 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,355 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,356 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:30:13,357 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2018-12-24 14:30:13,358 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:13,404 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:13,404 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2018-12-24 14:30:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:13,426 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:13,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:13,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:13,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:30:13,469 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:13,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:30:13,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:30:13,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:30:13,469 INFO L87 Difference]: Start difference. First operand 41 states and 150 transitions. Second operand 8 states. [2018-12-24 14:30:13,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:13,955 INFO L93 Difference]: Finished difference Result 74 states and 192 transitions. [2018-12-24 14:30:13,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:30:13,955 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:30:13,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:13,956 INFO L225 Difference]: With dead ends: 74 [2018-12-24 14:30:13,956 INFO L226 Difference]: Without dead ends: 72 [2018-12-24 14:30:13,956 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:30:13,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-12-24 14:30:13,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2018-12-24 14:30:13,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-12-24 14:30:13,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 149 transitions. [2018-12-24 14:30:13,966 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 149 transitions. Word has length 4 [2018-12-24 14:30:13,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:13,966 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 149 transitions. [2018-12-24 14:30:13,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:30:13,967 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 149 transitions. [2018-12-24 14:30:13,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:30:13,967 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:13,967 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:30:13,968 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:13,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:13,968 INFO L82 PathProgramCache]: Analyzing trace with hash 941718, now seen corresponding path program 1 times [2018-12-24 14:30:13,968 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:13,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:13,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:13,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:13,969 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:14,125 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 13 [2018-12-24 14:30:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:14,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:14,146 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:14,146 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:30:14,146 INFO L207 CegarAbsIntRunner]: [0], [18], [28], [31] [2018-12-24 14:30:14,148 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:14,148 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:14,553 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:14,553 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:30:14,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:14,554 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:14,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:14,554 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:30:14,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:14,572 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:14,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:14,752 WARN L181 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-12-24 14:30:14,755 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 [2018-12-24 14:30:14,760 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2018-12-24 14:30:14,764 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:14,766 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:14,767 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:30:14,773 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:14,774 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:14,775 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:14,776 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 [2018-12-24 14:30:14,780 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:14,781 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:14,783 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:14,784 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:14,785 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 [2018-12-24 14:30:14,830 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:14,831 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:14,833 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:14,835 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:14,837 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:14,838 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2018-12-24 14:30:14,849 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:30:14,850 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:14,899 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:14,938 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:14,969 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:14,997 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:15,021 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:15,038 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:15,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,080 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:30:15,138 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,141 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,141 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:30:15,196 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,203 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:30:15,249 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,250 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,250 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,252 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,253 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,254 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,255 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:30:15,316 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,318 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,319 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,321 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,322 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,323 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,324 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:30:15,326 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:15,352 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:15,377 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:15,404 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:15,431 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:15,480 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:15,480 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2018-12-24 14:30:15,515 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,529 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 100 [2018-12-24 14:30:15,530 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:30:15,685 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2018-12-24 14:30:15,685 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:106, output treesize:150 [2018-12-24 14:30:15,726 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,727 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,728 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,729 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,730 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,731 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,732 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:30:15,733 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 97 [2018-12-24 14:30:15,734 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:15,833 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,834 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,835 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,836 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,837 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,839 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,859 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,861 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 142 [2018-12-24 14:30:15,911 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 32 xjuncts. [2018-12-24 14:30:16,620 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 2 dim-1 vars, End of recursive call: 36 dim-0 vars, and 7 xjuncts. [2018-12-24 14:30:16,620 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 13 variables, input treesize:172, output treesize:455 [2018-12-24 14:30:21,311 WARN L181 SmtUtils]: Spent 2.53 s on a formula simplification. DAG size of input: 264 DAG size of output: 121 [2018-12-24 14:30:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:21,312 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:21,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:21,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:30:21,364 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:21,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:30:21,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:30:21,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=53, Unknown=1, NotChecked=0, Total=90 [2018-12-24 14:30:21,365 INFO L87 Difference]: Start difference. First operand 40 states and 149 transitions. Second operand 8 states. [2018-12-24 14:30:23,641 WARN L181 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2018-12-24 14:30:31,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:31,785 INFO L93 Difference]: Finished difference Result 79 states and 233 transitions. [2018-12-24 14:30:31,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:30:31,786 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:30:31,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:31,787 INFO L225 Difference]: With dead ends: 79 [2018-12-24 14:30:31,787 INFO L226 Difference]: Without dead ends: 71 [2018-12-24 14:30:31,788 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=44, Invalid=64, Unknown=2, NotChecked=0, Total=110 [2018-12-24 14:30:31,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-12-24 14:30:31,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 41. [2018-12-24 14:30:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-24 14:30:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 177 transitions. [2018-12-24 14:30:31,801 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 177 transitions. Word has length 4 [2018-12-24 14:30:31,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:31,802 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 177 transitions. [2018-12-24 14:30:31,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:30:31,802 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 177 transitions. [2018-12-24 14:30:31,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:30:31,802 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:31,803 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:30:31,803 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:31,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:31,803 INFO L82 PathProgramCache]: Analyzing trace with hash 930312, now seen corresponding path program 1 times [2018-12-24 14:30:31,803 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:31,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:31,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:31,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:31,804 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:31,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:30:32,022 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 14:30:32,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-24 14:30:32,022 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:30:32,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 14:30:32,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 14:30:32,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-24 14:30:32,023 INFO L87 Difference]: Start difference. First operand 41 states and 177 transitions. Second operand 4 states. [2018-12-24 14:30:32,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:32,471 INFO L93 Difference]: Finished difference Result 53 states and 195 transitions. [2018-12-24 14:30:32,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 14:30:32,471 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-12-24 14:30:32,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:32,472 INFO L225 Difference]: With dead ends: 53 [2018-12-24 14:30:32,473 INFO L226 Difference]: Without dead ends: 52 [2018-12-24 14:30:32,473 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-24 14:30:32,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-12-24 14:30:32,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2018-12-24 14:30:32,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-12-24 14:30:32,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 186 transitions. [2018-12-24 14:30:32,492 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 186 transitions. Word has length 4 [2018-12-24 14:30:32,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:32,493 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 186 transitions. [2018-12-24 14:30:32,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 14:30:32,493 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 186 transitions. [2018-12-24 14:30:32,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:30:32,494 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:32,496 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:30:32,496 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:32,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:32,496 INFO L82 PathProgramCache]: Analyzing trace with hash 929876, now seen corresponding path program 1 times [2018-12-24 14:30:32,496 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:32,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:32,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:32,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:32,497 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:32,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:32,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:32,602 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:32,602 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:30:32,603 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [31] [2018-12-24 14:30:32,603 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:32,604 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:33,011 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:33,012 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:30:33,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:33,012 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:33,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:33,013 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:30:33,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:33,029 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:33,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:33,115 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,116 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:30:33,158 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,159 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,160 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:30:33,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,202 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,203 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,205 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,206 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:30:33,261 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,262 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,263 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,264 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,266 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,267 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,268 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:30:33,330 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,331 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,332 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,334 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,335 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,336 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,337 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,338 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,339 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:30:33,340 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:33,368 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:33,396 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:33,423 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:33,450 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:33,488 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:30:33,491 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:30:33,494 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:30:33,496 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:30:33,500 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:30:33,503 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 [2018-12-24 14:30:33,512 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:30:33,513 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:33,549 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:33,579 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:33,621 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:33,639 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:33,653 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:33,667 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:33,716 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:33,716 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2018-12-24 14:30:33,780 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,781 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:30:33,782 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:33,965 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:33,966 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:30:33,989 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,990 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,991 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,991 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,992 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,993 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,994 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,995 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,996 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2018-12-24 14:30:33,997 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:34,042 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:34,042 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2018-12-24 14:30:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:34,061 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:34,094 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:34,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:30:34,094 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:34,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:30:34,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:30:34,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:30:34,095 INFO L87 Difference]: Start difference. First operand 43 states and 186 transitions. Second operand 8 states. [2018-12-24 14:30:34,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:34,592 INFO L93 Difference]: Finished difference Result 87 states and 278 transitions. [2018-12-24 14:30:34,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:30:34,592 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:30:34,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:34,594 INFO L225 Difference]: With dead ends: 87 [2018-12-24 14:30:34,594 INFO L226 Difference]: Without dead ends: 85 [2018-12-24 14:30:34,595 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:30:34,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-12-24 14:30:34,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 41. [2018-12-24 14:30:34,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-24 14:30:34,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 149 transitions. [2018-12-24 14:30:34,605 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 149 transitions. Word has length 4 [2018-12-24 14:30:34,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:34,606 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 149 transitions. [2018-12-24 14:30:34,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:30:34,606 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 149 transitions. [2018-12-24 14:30:34,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:30:34,607 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:34,607 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:30:34,607 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:34,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:34,607 INFO L82 PathProgramCache]: Analyzing trace with hash 945688, now seen corresponding path program 1 times [2018-12-24 14:30:34,607 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:34,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:34,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:34,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:34,609 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:34,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:34,660 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:34,660 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:30:34,660 INFO L207 CegarAbsIntRunner]: [0], [22], [32], [33] [2018-12-24 14:30:34,663 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:34,663 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:34,939 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:34,939 INFO L272 AbstractInterpreter]: Visited 4 different actions 6 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:30:34,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:34,940 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:34,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:34,940 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:30:34,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:34,948 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:34,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:34,992 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 [2018-12-24 14:30:34,996 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2018-12-24 14:30:35,003 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,005 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,006 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 [2018-12-24 14:30:35,009 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,011 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,015 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,016 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 [2018-12-24 14:30:35,025 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,027 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,029 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,032 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,032 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2018-12-24 14:30:35,065 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,067 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,069 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,071 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,072 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,073 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 [2018-12-24 14:30:35,171 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:30:35,172 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:35,220 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:35,268 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:35,297 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:35,321 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:35,338 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:35,354 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:35,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,403 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:30:35,457 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,459 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,459 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:30:35,528 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,534 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,536 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,536 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:30:35,609 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,611 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,613 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,615 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,618 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,620 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,620 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:30:35,699 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,701 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,704 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,707 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,710 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,713 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,715 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,717 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,717 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:30:35,718 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:35,761 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:35,787 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:35,813 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:35,838 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:35,886 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:35,887 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2018-12-24 14:30:35,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:35,928 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:30:35,929 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:35,972 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. [2018-12-24 14:30:35,972 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2018-12-24 14:30:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:35,988 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:36,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:36,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:30:36,017 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:36,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:30:36,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:30:36,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:30:36,018 INFO L87 Difference]: Start difference. First operand 41 states and 149 transitions. Second operand 6 states. [2018-12-24 14:30:36,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:36,211 INFO L93 Difference]: Finished difference Result 64 states and 185 transitions. [2018-12-24 14:30:36,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:30:36,212 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2018-12-24 14:30:36,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:36,212 INFO L225 Difference]: With dead ends: 64 [2018-12-24 14:30:36,213 INFO L226 Difference]: Without dead ends: 63 [2018-12-24 14:30:36,213 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:30:36,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-24 14:30:36,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 42. [2018-12-24 14:30:36,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-24 14:30:36,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 157 transitions. [2018-12-24 14:30:36,224 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 157 transitions. Word has length 4 [2018-12-24 14:30:36,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:36,224 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 157 transitions. [2018-12-24 14:30:36,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:30:36,225 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 157 transitions. [2018-12-24 14:30:36,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:30:36,225 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:36,225 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:30:36,226 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:36,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:36,226 INFO L82 PathProgramCache]: Analyzing trace with hash 945004, now seen corresponding path program 1 times [2018-12-24 14:30:36,226 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:36,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:36,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:36,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:36,227 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:36,406 WARN L181 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2018-12-24 14:30:36,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:36,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:36,451 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:36,451 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:30:36,451 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [31] [2018-12-24 14:30:36,456 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:36,456 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:36,760 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:36,760 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:30:36,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:36,760 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:36,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:36,760 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:30:36,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:36,769 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:36,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:36,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:36,801 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 [2018-12-24 14:30:36,804 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 [2018-12-24 14:30:36,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:36,810 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:36,810 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 [2018-12-24 14:30:36,819 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:36,822 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:36,824 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:36,824 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 [2018-12-24 14:30:36,830 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:36,832 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:36,834 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:36,837 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:36,838 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:30:36,847 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:36,849 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:36,851 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:36,853 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:36,855 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:36,855 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 [2018-12-24 14:30:36,870 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:30:36,871 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:36,910 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:36,942 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:36,968 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:36,987 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:37,004 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:37,021 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:37,056 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,057 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 68 treesize of output 71 [2018-12-24 14:30:37,092 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,093 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,094 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:30:37,136 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,136 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,137 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,138 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,139 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:30:37,209 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,211 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,212 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,213 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,214 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,215 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:30:37,278 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,280 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,281 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,284 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,286 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,287 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,287 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:30:37,288 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:37,315 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:37,340 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:37,364 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:37,390 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:37,438 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:37,438 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2018-12-24 14:30:37,510 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,511 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:30:37,511 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:37,555 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:37,556 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:30:37,585 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,586 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,588 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,589 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,592 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,593 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:37,594 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:30:37,594 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:37,638 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:37,639 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2018-12-24 14:30:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:37,659 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:37,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:37,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:30:37,695 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:37,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:30:37,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:30:37,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:30:37,696 INFO L87 Difference]: Start difference. First operand 42 states and 157 transitions. Second operand 8 states. [2018-12-24 14:30:38,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:38,689 INFO L93 Difference]: Finished difference Result 98 states and 268 transitions. [2018-12-24 14:30:38,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:30:38,690 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:30:38,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:38,691 INFO L225 Difference]: With dead ends: 98 [2018-12-24 14:30:38,691 INFO L226 Difference]: Without dead ends: 97 [2018-12-24 14:30:38,692 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2018-12-24 14:30:38,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-12-24 14:30:38,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 47. [2018-12-24 14:30:38,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-24 14:30:38,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 197 transitions. [2018-12-24 14:30:38,705 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 197 transitions. Word has length 4 [2018-12-24 14:30:38,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:38,706 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 197 transitions. [2018-12-24 14:30:38,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:30:38,706 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 197 transitions. [2018-12-24 14:30:38,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:30:38,706 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:38,706 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:30:38,707 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:38,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:38,707 INFO L82 PathProgramCache]: Analyzing trace with hash 945500, now seen corresponding path program 1 times [2018-12-24 14:30:38,707 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:38,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:38,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:38,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:38,708 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:38,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:38,801 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:38,801 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:30:38,801 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [31] [2018-12-24 14:30:38,802 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:38,803 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:39,112 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:39,113 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:30:39,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:39,113 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:39,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:39,113 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:30:39,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:39,125 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:39,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:39,168 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 [2018-12-24 14:30:39,172 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 [2018-12-24 14:30:39,178 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,180 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,180 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 [2018-12-24 14:30:39,187 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,189 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,190 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,191 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2018-12-24 14:30:39,197 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,200 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,202 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,203 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 [2018-12-24 14:30:39,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,213 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,215 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,217 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,218 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 [2018-12-24 14:30:39,238 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:30:39,239 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:39,282 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:39,316 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:39,342 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:39,362 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:39,378 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:39,393 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:39,431 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,432 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:30:39,470 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,471 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,472 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:30:39,514 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,515 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,516 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,517 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:30:39,568 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,569 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,569 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,571 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,572 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,573 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,574 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:30:39,639 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,640 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,641 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,642 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,643 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,644 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,645 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,646 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,647 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:30:39,647 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:39,674 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:39,700 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:39,726 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:39,753 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:39,802 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:39,803 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2018-12-24 14:30:40,247 WARN L181 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2018-12-24 14:30:40,289 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:40,290 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:30:40,291 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:40,820 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:40,820 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:30:41,036 WARN L181 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2018-12-24 14:30:41,066 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:41,078 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:41,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:41,122 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:41,145 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:41,167 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:41,192 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:41,222 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:41,222 INFO L303 Elim1Store]: Index analysis took 182 ms [2018-12-24 14:30:41,223 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:30:41,224 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:41,689 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:41,690 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2018-12-24 14:30:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:41,712 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:41,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:41,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:30:41,769 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:41,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:30:41,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:30:41,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:30:41,770 INFO L87 Difference]: Start difference. First operand 47 states and 197 transitions. Second operand 8 states. [2018-12-24 14:30:42,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:42,190 INFO L93 Difference]: Finished difference Result 91 states and 282 transitions. [2018-12-24 14:30:42,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:30:42,191 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:30:42,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:42,192 INFO L225 Difference]: With dead ends: 91 [2018-12-24 14:30:42,193 INFO L226 Difference]: Without dead ends: 89 [2018-12-24 14:30:42,193 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:30:42,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-12-24 14:30:42,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 56. [2018-12-24 14:30:42,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-24 14:30:42,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 243 transitions. [2018-12-24 14:30:42,209 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 243 transitions. Word has length 4 [2018-12-24 14:30:42,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:42,209 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 243 transitions. [2018-12-24 14:30:42,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:30:42,209 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 243 transitions. [2018-12-24 14:30:42,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:30:42,210 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:42,210 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:30:42,210 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:42,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:42,211 INFO L82 PathProgramCache]: Analyzing trace with hash 933968, now seen corresponding path program 1 times [2018-12-24 14:30:42,211 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:42,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:42,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:42,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:42,212 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:42,375 WARN L181 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2018-12-24 14:30:42,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:42,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:42,390 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:42,390 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:30:42,390 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [31] [2018-12-24 14:30:42,392 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:42,392 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:42,720 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:42,720 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:30:42,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:42,720 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:42,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:42,720 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:30:42,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:42,729 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:42,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:42,768 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,769 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:30:42,831 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,831 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,832 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:30:42,874 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,876 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,877 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,878 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,879 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:30:42,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,929 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,930 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,931 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,932 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,933 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,934 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:30:42,999 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,000 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,001 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,003 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,004 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,005 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,006 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,007 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,008 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:30:43,009 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,036 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,063 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,090 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,118 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,154 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:30:43,158 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:30:43,160 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:30:43,163 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:30:43,168 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:30:43,170 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 [2018-12-24 14:30:43,177 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:30:43,178 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,217 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,247 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,269 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,288 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,303 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,318 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,366 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:43,367 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2018-12-24 14:30:43,411 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,412 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:30:43,413 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,458 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:43,459 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:30:43,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,518 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,519 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,520 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,521 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,522 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,523 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,524 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:30:43,525 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 112 [2018-12-24 14:30:43,525 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,573 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:43,573 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:61 [2018-12-24 14:30:43,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:43,612 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:43,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:43,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:30:43,655 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:43,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:30:43,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:30:43,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:30:43,656 INFO L87 Difference]: Start difference. First operand 56 states and 243 transitions. Second operand 8 states. [2018-12-24 14:30:45,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:45,522 INFO L93 Difference]: Finished difference Result 92 states and 291 transitions. [2018-12-24 14:30:45,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:30:45,522 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:30:45,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:45,524 INFO L225 Difference]: With dead ends: 92 [2018-12-24 14:30:45,524 INFO L226 Difference]: Without dead ends: 90 [2018-12-24 14:30:45,524 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:30:45,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-12-24 14:30:45,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 59. [2018-12-24 14:30:45,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-24 14:30:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 254 transitions. [2018-12-24 14:30:45,540 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 254 transitions. Word has length 4 [2018-12-24 14:30:45,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:45,540 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 254 transitions. [2018-12-24 14:30:45,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:30:45,541 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 254 transitions. [2018-12-24 14:30:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:30:45,541 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:45,541 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:30:45,542 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:45,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:45,542 INFO L82 PathProgramCache]: Analyzing trace with hash 949406, now seen corresponding path program 1 times [2018-12-24 14:30:45,542 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:45,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:45,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:45,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:45,543 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:45,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:45,734 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:45,734 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:30:45,734 INFO L207 CegarAbsIntRunner]: [0], [26], [28], [31] [2018-12-24 14:30:45,735 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:45,735 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:46,055 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:46,055 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:30:46,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:46,056 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:46,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:46,056 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:30:46,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:46,068 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:46,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:46,294 WARN L181 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-12-24 14:30:46,305 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 [2018-12-24 14:30:46,322 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 [2018-12-24 14:30:46,358 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,372 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:30:46,413 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,434 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,448 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,449 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 [2018-12-24 14:30:46,452 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,457 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,458 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,459 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 [2018-12-24 14:30:46,475 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,477 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,477 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,480 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 [2018-12-24 14:30:46,491 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:30:46,492 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:46,536 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:46,569 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:46,595 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:46,634 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:46,652 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:46,668 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:46,705 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,706 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:30:46,743 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:30:46,785 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,786 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,787 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,788 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,789 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:30:46,840 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,841 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,841 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,842 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,843 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,844 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:30:46,908 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,909 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,911 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,912 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,913 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,914 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,915 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,916 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,917 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:30:46,918 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:46,943 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:46,969 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:46,994 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:47,021 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:47,071 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:47,071 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2018-12-24 14:30:47,144 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:47,184 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 106 [2018-12-24 14:30:47,185 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:30:47,349 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2018-12-24 14:30:47,349 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:106, output treesize:150 [2018-12-24 14:30:47,390 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:47,391 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:47,391 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:47,392 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:47,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:47,395 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:47,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:47,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:47,408 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:47,446 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 142 [2018-12-24 14:30:47,456 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 32 xjuncts. [2018-12-24 14:30:48,458 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:48,459 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:48,459 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:48,461 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:48,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:48,463 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:48,463 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:30:48,464 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 97 [2018-12-24 14:30:48,465 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:48,722 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 2 dim-1 vars, End of recursive call: 36 dim-0 vars, and 7 xjuncts. [2018-12-24 14:30:48,723 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 13 variables, input treesize:172, output treesize:455 [2018-12-24 14:31:13,301 WARN L181 SmtUtils]: Spent 22.40 s on a formula simplification. DAG size of input: 264 DAG size of output: 121 [2018-12-24 14:31:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:13,303 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:13,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:13,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:31:13,351 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:13,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:31:13,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:31:13,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=53, Unknown=1, NotChecked=0, Total=90 [2018-12-24 14:31:13,352 INFO L87 Difference]: Start difference. First operand 59 states and 254 transitions. Second operand 8 states. [2018-12-24 14:31:19,625 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2018-12-24 14:31:19,626 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:102) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.pop(ManagedScript.java:131) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:652) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:256) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:164) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:715) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:628) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:472) 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.io.IOException: Stream closed at java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:433) at java.io.OutputStream.write(OutputStream.java:116) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:297) at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141) at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229) at java.io.BufferedWriter.flush(BufferedWriter.java:254) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:120) ... 28 more [2018-12-24 14:31:19,631 INFO L168 Benchmark]: Toolchain (without parser) took 89360.28 ms. Allocated memory was 1.5 GB in the beginning and 2.8 GB in the end (delta: 1.3 GB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -209.1 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-12-24 14:31:19,632 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-24 14:31:19,632 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.68 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-24 14:31:19,632 INFO L168 Benchmark]: Boogie Preprocessor took 28.28 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-24 14:31:19,633 INFO L168 Benchmark]: RCFGBuilder took 484.03 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-12-24 14:31:19,633 INFO L168 Benchmark]: TraceAbstraction took 88781.87 ms. Allocated memory was 1.5 GB in the beginning and 2.8 GB in the end (delta: 1.3 GB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -230.2 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-12-24 14:31:19,634 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 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 61.68 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.28 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 484.03 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 88781.87 ms. Allocated memory was 1.5 GB in the beginning and 2.8 GB in the end (delta: 1.3 GB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -230.2 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...