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-8-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fa1c628-m [2019-01-31 17:36:02,455 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-31 17:36:02,457 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-31 17:36:02,470 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-01-31 17:36:02,515 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 [2019-01-31 17:36:02,539 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-31 17:36:02,539 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-31 17:36:02,540 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-31 17:36:02,540 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-31 17:36:02,540 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-31 17:36:02,541 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-31 17:36:02,541 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-31 17:36:02,541 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-31 17:36:02,541 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-31 17:36:02,541 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-01-31 17:36:02,542 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-01-31 17:36:02,544 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-31 17:36:02,544 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-31 17:36:02,545 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-31 17:36:02,545 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-31 17:36:02,546 INFO L133 SettingsManager]: * Use SBE=true [2019-01-31 17:36:02,546 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-31 17:36:02,546 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-31 17:36:02,546 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-31 17:36:02,547 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-31 17:36:02,548 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-31 17:36:02,548 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-31 17:36:02,549 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-31 17:36:02,549 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-31 17:36:02,549 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-31 17:36:02,549 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-31 17:36:02,549 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-31 17:36:02,550 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-31 17:36:02,550 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-31 17:36:02,550 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-31 17:36:02,550 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in -t:10000 [2019-01-31 17:36:02,551 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-31 17:36:02,551 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-31 17:36:02,551 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-31 17:36:02,551 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-31 17:36:02,551 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-31 17:36:02,552 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in [2019-01-31 17:36:02,552 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-31 17:36:02,553 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-31 17:36:02,607 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-31 17:36:02,620 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-31 17:36:02,626 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-31 17:36:02,628 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-31 17:36:02,629 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-31 17:36:02,630 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl [2019-01-31 17:36:02,630 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl' [2019-01-31 17:36:02,681 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-31 17:36:02,684 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-31 17:36:02,685 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-31 17:36:02,685 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-31 17:36:02,685 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-31 17:36:02,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:36:02" (1/1) ... [2019-01-31 17:36:02,718 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:36:02" (1/1) ... [2019-01-31 17:36:02,753 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-31 17:36:02,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-31 17:36:02,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-31 17:36:02,755 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-31 17:36:02,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:36:02" (1/1) ... [2019-01-31 17:36:02,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:36:02" (1/1) ... [2019-01-31 17:36:02,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:36:02" (1/1) ... [2019-01-31 17:36:02,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:36:02" (1/1) ... [2019-01-31 17:36:02,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:36:02" (1/1) ... [2019-01-31 17:36:02,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:36:02" (1/1) ... [2019-01-31 17:36:02,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:36:02" (1/1) ... [2019-01-31 17:36:02,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-31 17:36:02,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-31 17:36:02,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-31 17:36:02,794 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-31 17:36:02,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:36:02" (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:8092 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in -t:10000 [2019-01-31 17:36:02,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-31 17:36:02,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-31 17:36:03,359 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-31 17:36:03,359 INFO L286 CfgBuilder]: Removed 19 assue(true) statements. [2019-01-31 17:36:03,361 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:36:03 BoogieIcfgContainer [2019-01-31 17:36:03,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-31 17:36:03,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-31 17:36:03,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-31 17:36:03,365 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-31 17:36:03,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:36:02" (1/2) ... [2019-01-31 17:36:03,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a9e034f and model type speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:36:03, skipping insertion in model container [2019-01-31 17:36:03,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:36:03" (2/2) ... [2019-01-31 17:36:03,369 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-8-unlimited.bpl [2019-01-31 17:36:03,379 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-31 17:36:03,388 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-01-31 17:36:03,405 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-01-31 17:36:03,440 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-31 17:36:03,440 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-31 17:36:03,440 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-31 17:36:03,440 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-31 17:36:03,441 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-31 17:36:03,441 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-31 17:36:03,441 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-31 17:36:03,441 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-31 17:36:03,458 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-01-31 17:36:03,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-31 17:36:03,465 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:36:03,467 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-31 17:36:03,469 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:36:03,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:36:03,477 INFO L82 PathProgramCache]: Analyzing trace with hash 996, now seen corresponding path program 1 times [2019-01-31 17:36:03,479 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:36:03,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:36:03,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:36:03,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:36:03,537 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:36:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:36:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:36:03,712 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-31 17:36:03,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-31 17:36:03,713 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-31 17:36:03,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-31 17:36:03,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-31 17:36:03,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-31 17:36:03,731 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-01-31 17:36:03,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:36:03,944 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2019-01-31 17:36:03,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-31 17:36:03,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-31 17:36:03,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:36:03,963 INFO L225 Difference]: With dead ends: 37 [2019-01-31 17:36:03,963 INFO L226 Difference]: Without dead ends: 32 [2019-01-31 17:36:03,967 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-31 17:36:03,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-01-31 17:36:04,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 18. [2019-01-31 17:36:04,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-01-31 17:36:04,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 33 transitions. [2019-01-31 17:36:04,006 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 33 transitions. Word has length 2 [2019-01-31 17:36:04,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:36:04,007 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 33 transitions. [2019-01-31 17:36:04,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-31 17:36:04,007 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 33 transitions. [2019-01-31 17:36:04,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-31 17:36:04,008 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:36:04,008 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-31 17:36:04,009 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:36:04,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:36:04,009 INFO L82 PathProgramCache]: Analyzing trace with hash 30818, now seen corresponding path program 1 times [2019-01-31 17:36:04,009 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:36:04,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:36:04,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:36:04,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:36:04,011 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:36:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:36:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:36:04,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:36:04,205 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:36:04,209 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-31 17:36:04,211 INFO L207 CegarAbsIntRunner]: [0], [32], [35] [2019-01-31 17:36:04,275 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:36:04,276 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:36:08,230 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:36:08,232 INFO L272 AbstractInterpreter]: Visited 3 different actions 11 times. Merged at 1 different actions 4 times. Widened at 1 different actions 1 times. Found 5 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-31 17:36:08,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:36:08,240 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:36:08,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:36:08,241 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:36:08,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:36:08,260 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:36:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:36:08,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:36:08,471 WARN L181 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-31 17:36:08,500 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 27 treesize of output 30 [2019-01-31 17:36:08,518 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 30 treesize of output 36 [2019-01-31 17:36:08,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:08,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:08,582 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 32 treesize of output 46 [2019-01-31 17:36:08,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:08,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:08,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:08,667 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 34 treesize of output 60 [2019-01-31 17:36:08,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:08,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:08,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:08,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:08,726 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:36:08,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:08,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:08,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:08,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:08,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:08,812 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 38 treesize of output 100 [2019-01-31 17:36:08,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:08,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:08,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:08,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:08,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:08,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:08,955 INFO L303 Elim1Store]: Index analysis took 136 ms [2019-01-31 17:36:08,957 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:36:08,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:08,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:08,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:08,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:08,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:08,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:09,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:09,002 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-31 17:36:09,004 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:36:09,573 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:09,965 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:10,041 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:10,077 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:10,104 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:10,127 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:10,152 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:10,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,221 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 117 treesize of output 114 [2019-01-31 17:36:10,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,305 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 101 treesize of output 104 [2019-01-31 17:36:10,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,396 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 83 treesize of output 103 [2019-01-31 17:36:10,555 WARN L181 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-01-31 17:36:10,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,576 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 68 treesize of output 105 [2019-01-31 17:36:10,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-31 17:36:10,828 WARN L181 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-31 17:36:10,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:10,877 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-31 17:36:11,022 WARN L181 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-31 17:36:11,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:11,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:11,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:11,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:11,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:11,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:11,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:11,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:11,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:11,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:11,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:11,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:11,062 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-31 17:36:11,064 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-31 17:36:11,124 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:11,249 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:11,316 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:11,391 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:11,498 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:11,563 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:11,677 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:36:11,678 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:147, output treesize:153 [2019-01-31 17:36:11,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:11,764 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-31 17:36:11,765 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:36:11,949 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-31 17:36:11,949 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-31 17:36:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:36:12,017 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:36:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:36:12,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:36:12,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-31 17:36:12,165 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:36:12,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-31 17:36:12,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-31 17:36:12,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-31 17:36:12,167 INFO L87 Difference]: Start difference. First operand 18 states and 33 transitions. Second operand 6 states. [2019-01-31 17:36:23,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:36:23,852 INFO L93 Difference]: Finished difference Result 63 states and 92 transitions. [2019-01-31 17:36:23,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-31 17:36:23,853 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-31 17:36:23,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:36:23,856 INFO L225 Difference]: With dead ends: 63 [2019-01-31 17:36:23,856 INFO L226 Difference]: Without dead ends: 60 [2019-01-31 17:36:23,857 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-31 17:36:23,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-01-31 17:36:23,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 25. [2019-01-31 17:36:23,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-01-31 17:36:23,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 53 transitions. [2019-01-31 17:36:23,869 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 53 transitions. Word has length 3 [2019-01-31 17:36:23,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:36:23,869 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 53 transitions. [2019-01-31 17:36:23,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-31 17:36:23,870 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 53 transitions. [2019-01-31 17:36:23,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-31 17:36:23,870 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:36:23,870 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-31 17:36:23,871 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:36:23,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:36:23,871 INFO L82 PathProgramCache]: Analyzing trace with hash 30384, now seen corresponding path program 1 times [2019-01-31 17:36:23,871 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:36:23,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:36:23,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:36:23,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:36:23,874 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:36:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:36:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:36:23,978 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:36:23,978 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:36:23,978 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-31 17:36:23,978 INFO L207 CegarAbsIntRunner]: [0], [18], [35] [2019-01-31 17:36:23,980 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:36:23,980 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:36:24,315 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:36:24,315 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. [2019-01-31 17:36:24,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:36:24,316 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:36:24,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:36:24,316 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:36:24,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:36:24,333 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:36:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:36:24,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:36:24,376 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 27 treesize of output 30 [2019-01-31 17:36:24,380 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 30 treesize of output 36 [2019-01-31 17:36:24,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,390 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 32 treesize of output 46 [2019-01-31 17:36:24,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,454 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 34 treesize of output 60 [2019-01-31 17:36:24,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,481 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 36 treesize of output 78 [2019-01-31 17:36:24,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,497 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 38 treesize of output 100 [2019-01-31 17:36:24,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,531 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:36:24,550 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:36:24,552 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:36:24,614 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:24,662 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:24,698 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:24,728 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:24,752 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:24,773 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:24,802 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:24,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,851 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:36:24,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,908 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:36:24,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:24,971 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:36:25,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:25,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:25,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:25,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:25,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:25,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:25,051 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:36:25,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:25,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:25,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:25,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:25,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:25,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:25,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:25,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:25,137 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:36:25,247 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-31 17:36:25,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:25,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:25,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:25,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:25,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:25,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:25,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:25,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:25,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:25,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:25,264 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:36:25,265 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:36:25,306 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:25,347 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:25,389 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:25,431 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:25,473 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:25,546 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:36:25,547 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-31 17:36:25,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:25,610 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-31 17:36:25,611 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:36:25,677 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:36:25,678 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-31 17:36:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:36:25,697 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:36:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:36:25,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:36:25,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-31 17:36:25,727 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:36:25,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-31 17:36:25,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-31 17:36:25,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-31 17:36:25,728 INFO L87 Difference]: Start difference. First operand 25 states and 53 transitions. Second operand 6 states. [2019-01-31 17:36:26,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:36:26,634 INFO L93 Difference]: Finished difference Result 62 states and 99 transitions. [2019-01-31 17:36:26,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-31 17:36:26,635 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-31 17:36:26,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:36:26,636 INFO L225 Difference]: With dead ends: 62 [2019-01-31 17:36:26,636 INFO L226 Difference]: Without dead ends: 60 [2019-01-31 17:36:26,636 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-31 17:36:26,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-01-31 17:36:26,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 26. [2019-01-31 17:36:26,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-31 17:36:26,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 61 transitions. [2019-01-31 17:36:26,643 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 61 transitions. Word has length 3 [2019-01-31 17:36:26,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:36:26,643 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 61 transitions. [2019-01-31 17:36:26,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-31 17:36:26,644 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 61 transitions. [2019-01-31 17:36:26,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-31 17:36:26,644 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:36:26,644 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-31 17:36:26,645 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:36:26,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:36:26,645 INFO L82 PathProgramCache]: Analyzing trace with hash 30944, now seen corresponding path program 1 times [2019-01-31 17:36:26,645 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:36:26,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:36:26,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:36:26,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:36:26,647 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:36:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:36:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:36:26,712 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-31 17:36:26,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-31 17:36:26,712 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-31 17:36:26,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-31 17:36:26,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-31 17:36:26,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-31 17:36:26,713 INFO L87 Difference]: Start difference. First operand 26 states and 61 transitions. Second operand 3 states. [2019-01-31 17:36:26,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:36:26,785 INFO L93 Difference]: Finished difference Result 31 states and 61 transitions. [2019-01-31 17:36:26,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-31 17:36:26,785 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-31 17:36:26,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:36:26,786 INFO L225 Difference]: With dead ends: 31 [2019-01-31 17:36:26,786 INFO L226 Difference]: Without dead ends: 30 [2019-01-31 17:36:26,787 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-31 17:36:26,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-01-31 17:36:26,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-01-31 17:36:26,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-31 17:36:26,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 60 transitions. [2019-01-31 17:36:26,792 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 60 transitions. Word has length 3 [2019-01-31 17:36:26,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:36:26,793 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 60 transitions. [2019-01-31 17:36:26,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-31 17:36:26,793 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 60 transitions. [2019-01-31 17:36:26,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-31 17:36:26,793 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:36:26,793 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-31 17:36:26,794 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:36:26,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:36:26,795 INFO L82 PathProgramCache]: Analyzing trace with hash 30012, now seen corresponding path program 1 times [2019-01-31 17:36:26,795 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:36:26,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:36:26,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:36:26,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:36:26,796 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:36:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:36:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:36:26,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:36:26,886 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:36:26,887 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-31 17:36:26,887 INFO L207 CegarAbsIntRunner]: [0], [6], [35] [2019-01-31 17:36:26,890 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:36:26,890 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:36:27,227 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:36:27,228 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. [2019-01-31 17:36:27,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:36:27,229 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:36:27,229 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:36:27,229 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:36:27,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:36:27,246 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:36:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:36:27,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:36:27,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,309 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:36:27,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,426 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:36:27,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,483 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:36:27,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,549 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:36:27,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,631 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:36:27,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:27,739 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:36:27,740 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-31 17:36:27,789 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:27,830 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:27,900 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:28,001 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:28,075 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:28,133 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:36:28,138 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:36:28,141 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:36:28,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:36:28,152 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:36:28,157 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:36:28,171 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:36:28,184 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:36:28,185 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:36:28,242 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:28,285 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:28,318 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:28,344 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:28,456 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:28,475 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:28,491 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:28,566 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-31 17:36:28,566 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 9 variables, input treesize:121, output treesize:125 [2019-01-31 17:36:28,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:28,649 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-31 17:36:28,649 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:36:28,719 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:36:28,720 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-31 17:36:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:36:28,747 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:36:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:36:28,771 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-31 17:36:28,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-31 17:36:28,771 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-31 17:36:28,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-31 17:36:28,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-31 17:36:28,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-31 17:36:28,772 INFO L87 Difference]: Start difference. First operand 26 states and 60 transitions. Second operand 4 states. [2019-01-31 17:36:28,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:36:28,845 INFO L93 Difference]: Finished difference Result 32 states and 98 transitions. [2019-01-31 17:36:28,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-31 17:36:28,845 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-31 17:36:28,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:36:28,847 INFO L225 Difference]: With dead ends: 32 [2019-01-31 17:36:28,847 INFO L226 Difference]: Without dead ends: 31 [2019-01-31 17:36:28,848 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-31 17:36:28,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-01-31 17:36:28,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-01-31 17:36:28,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-31 17:36:28,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 97 transitions. [2019-01-31 17:36:28,855 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 97 transitions. Word has length 3 [2019-01-31 17:36:28,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:36:28,856 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 97 transitions. [2019-01-31 17:36:28,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-31 17:36:28,856 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 97 transitions. [2019-01-31 17:36:28,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-31 17:36:28,856 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:36:28,856 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-31 17:36:28,857 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:36:28,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:36:28,857 INFO L82 PathProgramCache]: Analyzing trace with hash 30136, now seen corresponding path program 1 times [2019-01-31 17:36:28,857 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:36:28,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:36:28,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:36:28,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:36:28,858 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:36:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:36:28,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:36:28,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:36:28,982 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:36:28,982 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-31 17:36:28,982 INFO L207 CegarAbsIntRunner]: [0], [10], [35] [2019-01-31 17:36:28,983 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:36:28,983 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:36:29,281 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:36:29,281 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. [2019-01-31 17:36:29,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:36:29,282 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:36:29,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:36:29,282 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:36:29,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:36:29,295 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:36:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:36:29,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:36:29,364 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 27 treesize of output 30 [2019-01-31 17:36:29,369 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:36:29,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,377 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 32 treesize of output 46 [2019-01-31 17:36:29,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,389 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 34 treesize of output 60 [2019-01-31 17:36:29,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,401 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 36 treesize of output 78 [2019-01-31 17:36:29,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,416 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 38 treesize of output 100 [2019-01-31 17:36:29,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,431 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:36:29,516 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:36:29,517 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:36:29,578 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:29,624 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:29,662 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:29,691 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:29,716 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:29,733 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:29,750 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:29,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,800 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:36:29,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,847 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:36:29,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,907 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:36:29,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:29,974 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:36:30,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:30,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:30,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:30,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:30,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:30,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:30,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:30,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:30,060 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:36:30,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:30,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:30,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:30,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:30,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:30,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:30,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:30,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:30,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:30,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:30,168 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:36:30,169 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:36:30,210 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:30,248 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:30,290 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:30,333 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:30,375 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:30,448 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:36:30,448 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-31 17:36:30,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:30,492 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-31 17:36:30,494 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:36:30,580 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:36:30,581 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-31 17:36:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:36:30,661 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:36:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:36:30,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:36:30,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-31 17:36:30,693 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:36:30,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-31 17:36:30,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-31 17:36:30,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-31 17:36:30,694 INFO L87 Difference]: Start difference. First operand 30 states and 97 transitions. Second operand 6 states. [2019-01-31 17:36:31,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:36:31,578 INFO L93 Difference]: Finished difference Result 65 states and 143 transitions. [2019-01-31 17:36:31,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-31 17:36:31,578 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-31 17:36:31,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:36:31,580 INFO L225 Difference]: With dead ends: 65 [2019-01-31 17:36:31,580 INFO L226 Difference]: Without dead ends: 64 [2019-01-31 17:36:31,580 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 [2019-01-31 17:36:31,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-01-31 17:36:31,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2019-01-31 17:36:31,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-01-31 17:36:31,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 115 transitions. [2019-01-31 17:36:31,589 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 115 transitions. Word has length 3 [2019-01-31 17:36:31,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:36:31,589 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 115 transitions. [2019-01-31 17:36:31,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-31 17:36:31,589 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 115 transitions. [2019-01-31 17:36:31,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-31 17:36:31,590 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:36:31,590 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-31 17:36:31,590 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:36:31,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:36:31,591 INFO L82 PathProgramCache]: Analyzing trace with hash 30632, now seen corresponding path program 1 times [2019-01-31 17:36:31,591 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:36:31,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:36:31,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:36:31,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:36:31,592 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:36:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:36:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:36:31,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:36:31,713 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:36:31,714 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-31 17:36:31,714 INFO L207 CegarAbsIntRunner]: [0], [26], [35] [2019-01-31 17:36:31,715 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:36:31,715 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:36:31,950 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:36:31,951 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. [2019-01-31 17:36:31,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:36:31,951 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:36:31,951 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:36:31,951 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:36:31,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:36:31,968 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:36:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:36:31,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:36:32,020 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 30 [2019-01-31 17:36:32,026 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:36:32,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,033 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 32 treesize of output 46 [2019-01-31 17:36:32,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,050 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:36:32,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,062 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 36 treesize of output 78 [2019-01-31 17:36:32,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,078 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 38 treesize of output 100 [2019-01-31 17:36:32,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,089 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:36:32,104 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:36:32,105 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:36:32,518 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:32,562 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:32,598 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:32,625 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:32,650 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:32,679 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:32,698 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:32,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,748 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:36:32,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,794 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:36:32,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,849 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:36:32,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,925 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:36:32,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:32,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:33,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:33,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:33,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:33,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:33,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:33,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:33,007 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:36:33,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:33,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:33,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:33,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:33,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:33,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:33,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:33,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:33,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:33,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:33,114 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:36:33,115 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:36:33,156 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:33,195 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:33,237 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:33,287 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:33,329 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:33,403 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:36:33,404 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-31 17:36:33,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:33,448 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-31 17:36:33,449 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:36:33,555 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:36:33,556 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-31 17:36:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:36:33,574 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:36:33,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:36:33,604 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:36:33,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-31 17:36:33,604 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:36:33,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-31 17:36:33,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-31 17:36:33,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-31 17:36:33,605 INFO L87 Difference]: Start difference. First operand 32 states and 115 transitions. Second operand 6 states. [2019-01-31 17:36:34,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:36:34,370 INFO L93 Difference]: Finished difference Result 67 states and 161 transitions. [2019-01-31 17:36:34,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-31 17:36:34,370 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-31 17:36:34,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:36:34,371 INFO L225 Difference]: With dead ends: 67 [2019-01-31 17:36:34,372 INFO L226 Difference]: Without dead ends: 65 [2019-01-31 17:36:34,372 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-31 17:36:34,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-01-31 17:36:34,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2019-01-31 17:36:34,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-01-31 17:36:34,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 132 transitions. [2019-01-31 17:36:34,380 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 132 transitions. Word has length 3 [2019-01-31 17:36:34,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:36:34,381 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 132 transitions. [2019-01-31 17:36:34,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-31 17:36:34,381 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 132 transitions. [2019-01-31 17:36:34,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:36:34,381 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:36:34,382 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:36:34,382 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:36:34,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:36:34,382 INFO L82 PathProgramCache]: Analyzing trace with hash 954866, now seen corresponding path program 1 times [2019-01-31 17:36:34,383 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:36:34,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:36:34,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:36:34,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:36:34,384 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:36:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:36:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:36:34,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:36:34,469 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:36:34,469 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:36:34,469 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [35] [2019-01-31 17:36:34,471 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:36:34,471 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:36:35,331 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:36:35,332 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-31 17:36:35,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:36:35,332 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:36:35,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:36:35,333 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:36:35,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:36:35,350 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:36:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:36:35,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:36:35,477 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 27 treesize of output 30 [2019-01-31 17:36:35,486 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 30 treesize of output 36 [2019-01-31 17:36:35,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,492 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 32 treesize of output 46 [2019-01-31 17:36:35,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,500 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 34 treesize of output 60 [2019-01-31 17:36:35,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,509 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 36 treesize of output 78 [2019-01-31 17:36:35,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,533 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 38 treesize of output 100 [2019-01-31 17:36:35,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,552 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:36:35,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:35,568 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-31 17:36:35,570 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:36:35,772 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:35,874 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:35,913 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:35,945 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:35,968 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:35,988 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:36,009 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:36,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,061 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 117 treesize of output 114 [2019-01-31 17:36:36,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,145 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-31 17:36:36,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,246 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-31 17:36:36,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,330 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 68 treesize of output 105 [2019-01-31 17:36:36,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,434 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-31 17:36:36,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,546 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-31 17:36:36,678 WARN L181 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-31 17:36:36,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:36,698 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-31 17:36:36,699 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-31 17:36:36,755 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:36,828 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:36,903 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:36,977 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:37,041 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:37,112 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:37,214 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:36:37,215 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-31 17:36:37,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:37,270 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-31 17:36:37,270 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:36:37,368 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:36:37,369 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-31 17:36:37,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:37,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:37,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:37,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:37,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:37,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:37,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:37,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:37,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:37,490 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:36:37,491 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-31 17:36:37,493 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:36:37,589 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-31 17:36:37,590 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-31 17:36:37,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:36:37,650 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:36:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:36:37,717 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:36:37,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-31 17:36:37,717 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:36:37,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:36:37,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:36:37,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-31 17:36:37,718 INFO L87 Difference]: Start difference. First operand 34 states and 132 transitions. Second operand 8 states. [2019-01-31 17:36:42,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:36:42,097 INFO L93 Difference]: Finished difference Result 82 states and 191 transitions. [2019-01-31 17:36:42,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-31 17:36:42,098 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:36:42,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:36:42,100 INFO L225 Difference]: With dead ends: 82 [2019-01-31 17:36:42,100 INFO L226 Difference]: Without dead ends: 80 [2019-01-31 17:36:42,101 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-31 17:36:42,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-01-31 17:36:42,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 36. [2019-01-31 17:36:42,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-01-31 17:36:42,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 128 transitions. [2019-01-31 17:36:42,109 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 128 transitions. Word has length 4 [2019-01-31 17:36:42,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:36:42,110 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 128 transitions. [2019-01-31 17:36:42,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:36:42,110 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 128 transitions. [2019-01-31 17:36:42,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:36:42,111 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:36:42,111 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:36:42,111 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:36:42,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:36:42,111 INFO L82 PathProgramCache]: Analyzing trace with hash 955426, now seen corresponding path program 1 times [2019-01-31 17:36:42,111 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:36:42,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:36:42,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:36:42,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:36:42,112 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:36:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:36:42,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:36:42,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:36:42,195 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:36:42,195 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:36:42,195 INFO L207 CegarAbsIntRunner]: [0], [32], [36], [37] [2019-01-31 17:36:42,197 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:36:42,197 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:36:43,918 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:36:43,919 INFO L272 AbstractInterpreter]: Visited 4 different actions 12 times. Merged at 1 different actions 4 times. Widened at 1 different actions 1 times. Found 5 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-31 17:36:43,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:36:43,919 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:36:43,919 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:36:43,919 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:36:43,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:36:43,935 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:36:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:36:43,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:36:43,984 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-31 17:36:44,178 WARN L181 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2019-01-31 17:36:44,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,211 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 73 treesize of output 80 [2019-01-31 17:36:44,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,274 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-31 17:36:44,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,347 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-31 17:36:44,519 WARN L181 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2019-01-31 17:36:44,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,548 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-31 17:36:44,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:44,659 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-31 17:36:44,659 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-31 17:36:44,719 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:44,775 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:44,843 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:44,902 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:44,965 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:45,097 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 27 treesize of output 30 [2019-01-31 17:36:45,101 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-31 17:36:45,107 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-31 17:36:45,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-31 17:36:45,180 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-31 17:36:45,188 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-31 17:36:45,195 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-31 17:36:45,206 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-31 17:36:45,207 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:36:45,259 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:45,301 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:45,332 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:45,357 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:45,377 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:45,395 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:45,412 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:36:45,482 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:36:45,483 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-31 17:36:46,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:46,247 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 149 [2019-01-31 17:36:46,248 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-31 17:36:46,302 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-31 17:36:48,170 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 54 dim-0 vars, and 9 xjuncts. [2019-01-31 17:36:48,171 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:131, output treesize:957 [2019-01-31 17:36:58,318 WARN L181 SmtUtils]: Spent 7.68 s on a formula simplification. DAG size of input: 519 DAG size of output: 113 [2019-01-31 17:36:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:36:58,325 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:36:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:36:58,362 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-31 17:36:58,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-31 17:36:58,362 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-31 17:36:58,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-31 17:36:58,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-31 17:36:58,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-31 17:36:58,363 INFO L87 Difference]: Start difference. First operand 36 states and 128 transitions. Second operand 4 states. [2019-01-31 17:36:58,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:36:58,420 INFO L93 Difference]: Finished difference Result 40 states and 140 transitions. [2019-01-31 17:36:58,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-31 17:36:58,420 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-31 17:36:58,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:36:58,422 INFO L225 Difference]: With dead ends: 40 [2019-01-31 17:36:58,422 INFO L226 Difference]: Without dead ends: 39 [2019-01-31 17:36:58,422 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-31 17:36:58,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-01-31 17:36:58,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-01-31 17:36:58,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-01-31 17:36:58,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 138 transitions. [2019-01-31 17:36:58,431 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 138 transitions. Word has length 4 [2019-01-31 17:36:58,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:36:58,431 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 138 transitions. [2019-01-31 17:36:58,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-31 17:36:58,431 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 138 transitions. [2019-01-31 17:36:58,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:36:58,432 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:36:58,432 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:36:58,433 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:36:58,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:36:58,433 INFO L82 PathProgramCache]: Analyzing trace with hash 954990, now seen corresponding path program 1 times [2019-01-31 17:36:58,433 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:36:58,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:36:58,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:36:58,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:36:58,434 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:36:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:36:58,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:36:58,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:36:58,527 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:36:58,527 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:36:58,527 INFO L207 CegarAbsIntRunner]: [0], [22], [32], [35] [2019-01-31 17:36:58,528 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:36:58,528 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:36:59,506 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:36:59,507 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-31 17:36:59,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:36:59,507 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:36:59,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:36:59,507 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:36:59,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:36:59,522 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:36:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:36:59,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:36:59,768 WARN L181 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-31 17:36:59,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:59,773 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-31 17:36:59,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:59,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:59,850 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-31 17:36:59,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:59,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:59,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:59,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:59,914 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-31 17:36:59,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:59,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:59,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:59,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:59,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:59,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:36:59,993 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 68 treesize of output 105 [2019-01-31 17:37:00,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,095 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-31 17:37:00,196 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-31 17:37:00,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,218 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-31 17:37:00,352 WARN L181 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-31 17:37:00,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:00,377 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-31 17:37:00,378 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:00,446 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:00,509 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:00,585 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:00,664 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:00,740 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:00,813 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:00,903 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:37:00,907 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:37:00,910 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:37:00,913 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:37:00,917 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:37:00,921 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:37:00,925 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:37:00,947 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-31 17:37:00,948 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:01,032 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:01,074 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:01,110 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:01,136 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:01,156 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:01,175 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:01,192 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:01,295 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:01,296 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-31 17:37:01,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:01,370 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-31 17:37:01,370 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:01,500 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:01,500 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-31 17:37:01,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:01,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:01,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:01,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:01,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:01,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:01,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:01,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:01,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:01,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:01,546 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2019-01-31 17:37:01,547 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:01,671 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:01,672 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-01-31 17:37:01,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:01,775 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:37:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:01,819 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:37:01,819 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-31 17:37:01,819 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:37:01,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:37:01,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:37:01,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-31 17:37:01,820 INFO L87 Difference]: Start difference. First operand 38 states and 138 transitions. Second operand 8 states. [2019-01-31 17:37:05,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:37:05,731 INFO L93 Difference]: Finished difference Result 84 states and 220 transitions. [2019-01-31 17:37:05,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-31 17:37:05,731 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:37:05,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:37:05,733 INFO L225 Difference]: With dead ends: 84 [2019-01-31 17:37:05,733 INFO L226 Difference]: Without dead ends: 82 [2019-01-31 17:37:05,734 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-31 17:37:05,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-01-31 17:37:05,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 43. [2019-01-31 17:37:05,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-31 17:37:05,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-01-31 17:37:05,744 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-01-31 17:37:05,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:37:05,744 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-01-31 17:37:05,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:37:05,744 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-01-31 17:37:05,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:37:05,745 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:37:05,745 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:37:05,745 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:37:05,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:37:05,746 INFO L82 PathProgramCache]: Analyzing trace with hash 954618, now seen corresponding path program 1 times [2019-01-31 17:37:05,746 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:37:05,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:37:05,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:37:05,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:37:05,747 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:37:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:37:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:05,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:37:05,853 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:37:05,854 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:37:05,854 INFO L207 CegarAbsIntRunner]: [0], [10], [32], [35] [2019-01-31 17:37:05,855 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:37:05,856 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:37:06,569 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:37:06,569 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-31 17:37:06,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:37:06,570 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:37:06,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:37:06,570 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:37:06,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:37:06,578 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:37:06,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:37:06,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:37:06,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:06,630 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 117 treesize of output 114 [2019-01-31 17:37:06,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:06,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:06,700 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 101 treesize of output 104 [2019-01-31 17:37:06,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:06,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:06,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:06,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:06,789 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 83 treesize of output 103 [2019-01-31 17:37:06,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:06,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:06,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:06,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:06,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:06,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:06,863 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 68 treesize of output 105 [2019-01-31 17:37:06,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:06,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:06,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:06,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:06,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:06,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:06,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:06,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:06,987 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-31 17:37:07,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:07,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:07,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:07,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:07,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:07,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:07,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:07,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:07,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:07,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:07,103 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-31 17:37:07,236 WARN L181 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-31 17:37:07,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:07,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:07,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:07,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:07,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:07,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:07,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:07,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:07,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:07,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:07,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:07,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:07,252 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-31 17:37:07,253 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:07,313 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:07,373 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:07,436 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:07,502 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:07,565 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:07,633 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:07,722 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:37:07,733 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:37:07,739 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:37:07,746 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:37:07,752 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:37:07,756 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:37:07,769 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:37:07,773 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-31 17:37:07,774 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:07,865 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:07,906 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:07,938 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:07,965 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:07,986 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:08,005 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:08,021 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:08,120 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:08,120 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-31 17:37:08,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:08,155 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-31 17:37:08,156 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:08,259 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:08,260 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-31 17:37:08,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:08,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:08,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:08,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:08,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:08,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:08,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:08,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:08,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:08,325 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:37:08,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2019-01-31 17:37:08,326 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:08,429 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:08,430 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-31 17:37:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:08,452 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:37:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:08,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:37:08,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-31 17:37:08,498 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:37:08,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:37:08,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:37:08,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-31 17:37:08,499 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-01-31 17:37:12,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:37:12,749 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-01-31 17:37:12,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-31 17:37:12,750 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:37:12,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:37:12,750 INFO L225 Difference]: With dead ends: 81 [2019-01-31 17:37:12,751 INFO L226 Difference]: Without dead ends: 80 [2019-01-31 17:37:12,751 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-31 17:37:12,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-01-31 17:37:12,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 43. [2019-01-31 17:37:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-31 17:37:12,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-01-31 17:37:12,760 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-01-31 17:37:12,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:37:12,761 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-01-31 17:37:12,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:37:12,761 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-01-31 17:37:12,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:37:12,762 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:37:12,762 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:37:12,762 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:37:12,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:37:12,762 INFO L82 PathProgramCache]: Analyzing trace with hash 955114, now seen corresponding path program 1 times [2019-01-31 17:37:12,763 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:37:12,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:37:12,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:37:12,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:37:12,764 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:37:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:37:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:12,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:37:12,915 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:37:12,916 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:37:12,916 INFO L207 CegarAbsIntRunner]: [0], [26], [32], [35] [2019-01-31 17:37:12,917 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:37:12,917 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:37:13,530 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:37:13,530 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-31 17:37:13,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:37:13,531 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:37:13,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:37:13,531 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:37:13,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:37:13,539 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:37:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:37:13,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:37:13,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:13,592 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-31 17:37:13,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:13,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:13,655 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 101 treesize of output 104 [2019-01-31 17:37:13,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:13,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:13,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:13,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:13,726 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-31 17:37:13,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:13,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:13,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:13,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:13,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:13,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:13,806 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 68 treesize of output 105 [2019-01-31 17:37:13,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:13,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:13,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:13,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:13,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:13,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:13,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:13,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:13,914 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-31 17:37:14,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:14,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:14,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:14,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:14,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:14,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:14,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:14,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:14,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:14,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:14,039 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-31 17:37:14,167 WARN L181 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-31 17:37:14,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:14,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:14,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:14,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:14,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:14,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:14,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:14,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:14,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:14,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:14,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:14,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:14,193 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-31 17:37:14,193 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:14,262 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:14,331 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:14,405 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:14,480 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:14,557 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:14,628 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:14,737 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:37:14,754 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:37:14,757 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:37:14,761 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:37:14,766 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:37:14,771 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:37:14,776 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:37:14,780 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-31 17:37:14,781 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:14,855 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:14,899 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:14,933 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:14,961 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:14,983 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:15,001 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:15,019 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:15,118 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:15,119 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-31 17:37:15,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:15,154 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-31 17:37:15,155 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:15,261 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:15,261 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-31 17:37:15,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:15,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:15,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:15,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:15,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:15,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:15,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:15,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:15,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:15,302 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:37:15,303 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2019-01-31 17:37:15,304 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:15,405 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:15,405 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-31 17:37:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:15,566 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:37:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:15,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:37:15,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-31 17:37:15,608 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:37:15,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:37:15,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:37:15,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-31 17:37:15,609 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-01-31 17:37:17,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:37:17,029 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-01-31 17:37:17,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-31 17:37:17,030 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:37:17,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:37:17,031 INFO L225 Difference]: With dead ends: 81 [2019-01-31 17:37:17,031 INFO L226 Difference]: Without dead ends: 79 [2019-01-31 17:37:17,032 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-31 17:37:17,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-01-31 17:37:17,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 44. [2019-01-31 17:37:17,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-01-31 17:37:17,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 175 transitions. [2019-01-31 17:37:17,043 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 175 transitions. Word has length 4 [2019-01-31 17:37:17,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:37:17,043 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 175 transitions. [2019-01-31 17:37:17,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:37:17,044 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 175 transitions. [2019-01-31 17:37:17,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:37:17,044 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:37:17,044 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:37:17,045 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:37:17,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:37:17,045 INFO L82 PathProgramCache]: Analyzing trace with hash 954742, now seen corresponding path program 1 times [2019-01-31 17:37:17,045 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:37:17,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:37:17,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:37:17,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:37:17,046 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:37:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:37:17,256 WARN L181 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 12 [2019-01-31 17:37:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:17,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:37:17,317 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:37:17,317 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:37:17,317 INFO L207 CegarAbsIntRunner]: [0], [14], [32], [35] [2019-01-31 17:37:17,319 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:37:17,319 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:37:17,979 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:37:17,979 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-31 17:37:17,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:37:17,980 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:37:17,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:37:17,980 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:37:17,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:37:17,995 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:37:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:37:18,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:37:18,113 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 27 treesize of output 30 [2019-01-31 17:37:18,132 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 30 treesize of output 36 [2019-01-31 17:37:18,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,193 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 32 treesize of output 46 [2019-01-31 17:37:18,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,260 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 34 treesize of output 60 [2019-01-31 17:37:18,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,377 INFO L303 Elim1Store]: Index analysis took 114 ms [2019-01-31 17:37:18,378 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:37:18,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,513 INFO L303 Elim1Store]: Index analysis took 133 ms [2019-01-31 17:37:18,515 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 38 treesize of output 100 [2019-01-31 17:37:18,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,670 INFO L303 Elim1Store]: Index analysis took 152 ms [2019-01-31 17:37:18,671 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:37:18,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:18,851 INFO L303 Elim1Store]: Index analysis took 175 ms [2019-01-31 17:37:18,852 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-31 17:37:18,853 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:19,569 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:19,619 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:19,656 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:19,683 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:19,709 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:19,731 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:19,751 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:19,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:19,806 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-31 17:37:19,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:19,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:19,862 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 101 treesize of output 104 [2019-01-31 17:37:19,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:19,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:19,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:19,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:19,926 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 83 treesize of output 103 [2019-01-31 17:37:19,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:19,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:19,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:19,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:19,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:19,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:19,999 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-31 17:37:20,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,094 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-31 17:37:20,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,210 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-31 17:37:20,338 WARN L181 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-31 17:37:20,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,356 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-31 17:37:20,357 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:20,416 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:20,474 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:20,534 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:20,595 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:20,659 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:20,723 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:20,819 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:20,819 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-31 17:37:20,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:20,855 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-31 17:37:20,856 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:20,953 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:20,954 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-31 17:37:20,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:21,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:21,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:21,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:21,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:21,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:21,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:21,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:21,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:21,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:21,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2019-01-31 17:37:21,014 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:21,115 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:21,116 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-01-31 17:37:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:21,199 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:37:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:21,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:37:21,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-31 17:37:21,250 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:37:21,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:37:21,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:37:21,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-31 17:37:21,251 INFO L87 Difference]: Start difference. First operand 44 states and 175 transitions. Second operand 8 states. [2019-01-31 17:37:24,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:37:24,794 INFO L93 Difference]: Finished difference Result 99 states and 274 transitions. [2019-01-31 17:37:24,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-31 17:37:24,795 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:37:24,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:37:24,796 INFO L225 Difference]: With dead ends: 99 [2019-01-31 17:37:24,797 INFO L226 Difference]: Without dead ends: 95 [2019-01-31 17:37:24,797 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-31 17:37:24,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-01-31 17:37:24,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 52. [2019-01-31 17:37:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-01-31 17:37:24,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 210 transitions. [2019-01-31 17:37:24,810 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 210 transitions. Word has length 4 [2019-01-31 17:37:24,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:37:24,811 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 210 transitions. [2019-01-31 17:37:24,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:37:24,811 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 210 transitions. [2019-01-31 17:37:24,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:37:24,812 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:37:24,812 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:37:24,812 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:37:24,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:37:24,812 INFO L82 PathProgramCache]: Analyzing trace with hash 941536, now seen corresponding path program 1 times [2019-01-31 17:37:24,812 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:37:24,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:37:24,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:37:24,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:37:24,815 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:37:24,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:37:24,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:24,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:37:24,924 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:37:24,924 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:37:24,924 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [35] [2019-01-31 17:37:24,926 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:37:24,926 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:37:25,250 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:37:25,250 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. [2019-01-31 17:37:25,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:37:25,250 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:37:25,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:37:25,250 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:37:25,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:37:25,259 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:37:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:37:25,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:37:25,306 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 27 treesize of output 30 [2019-01-31 17:37:25,311 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 30 treesize of output 36 [2019-01-31 17:37:25,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,322 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 32 treesize of output 46 [2019-01-31 17:37:25,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,332 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 34 treesize of output 60 [2019-01-31 17:37:25,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,363 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 36 treesize of output 78 [2019-01-31 17:37:25,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,375 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 38 treesize of output 100 [2019-01-31 17:37:25,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,387 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:37:25,402 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:37:25,403 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:25,466 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:25,513 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:25,549 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:25,579 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:25,604 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:25,621 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:25,641 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:25,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,687 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:37:25,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,737 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:37:25,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,791 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:37:25,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,854 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:37:25,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:25,935 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:37:26,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:26,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:26,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:26,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:26,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:26,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:26,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:26,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:26,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:26,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:26,040 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:37:26,040 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:26,080 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:26,121 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:26,165 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:26,208 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:26,248 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:26,321 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:26,321 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-31 17:37:26,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:26,372 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-31 17:37:26,372 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:26,437 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:26,438 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-31 17:37:26,650 WARN L181 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2019-01-31 17:37:26,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:26,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:26,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:26,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:26,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:26,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:26,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:26,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:26,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:26,876 INFO L303 Elim1Store]: Index analysis took 217 ms [2019-01-31 17:37:26,877 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 134 [2019-01-31 17:37:26,878 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:27,636 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:27,636 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-31 17:37:27,865 WARN L181 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2019-01-31 17:37:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:27,867 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:37:28,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:28,359 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:37:28,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-31 17:37:28,359 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:37:28,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:37:28,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:37:28,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-31 17:37:28,360 INFO L87 Difference]: Start difference. First operand 52 states and 210 transitions. Second operand 8 states. [2019-01-31 17:37:28,916 WARN L181 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2019-01-31 17:37:30,011 WARN L181 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2019-01-31 17:37:30,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:37:30,469 INFO L93 Difference]: Finished difference Result 101 states and 289 transitions. [2019-01-31 17:37:30,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-31 17:37:30,469 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:37:30,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:37:30,471 INFO L225 Difference]: With dead ends: 101 [2019-01-31 17:37:30,471 INFO L226 Difference]: Without dead ends: 99 [2019-01-31 17:37:30,472 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-31 17:37:30,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-31 17:37:30,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 59. [2019-01-31 17:37:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-01-31 17:37:30,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 243 transitions. [2019-01-31 17:37:30,487 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 243 transitions. Word has length 4 [2019-01-31 17:37:30,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:37:30,487 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 243 transitions. [2019-01-31 17:37:30,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:37:30,487 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 243 transitions. [2019-01-31 17:37:30,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:37:30,488 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:37:30,488 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:37:30,488 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:37:30,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:37:30,489 INFO L82 PathProgramCache]: Analyzing trace with hash 941164, now seen corresponding path program 1 times [2019-01-31 17:37:30,489 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:37:30,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:37:30,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:37:30,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:37:30,490 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:37:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:37:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:30,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:37:30,598 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:37:30,598 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:37:30,598 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [35] [2019-01-31 17:37:30,599 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:37:30,600 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:37:31,019 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:37:31,020 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. [2019-01-31 17:37:31,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:37:31,020 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:37:31,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:37:31,020 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:37:31,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:37:31,030 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:37:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:37:31,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:37:31,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,079 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:37:31,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,131 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:37:31,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,185 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:37:31,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,248 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:37:31,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,333 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:37:31,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:31,446 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:37:31,447 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:31,490 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:31,531 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:31,575 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:31,619 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:31,662 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:31,715 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:37:31,718 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:37:31,720 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:37:31,725 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:37:31,728 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:37:31,746 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:37:31,764 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:37:31,822 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:37:31,823 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:32,410 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:32,454 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:32,486 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:32,510 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:32,531 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:32,550 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:32,570 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:32,643 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:32,644 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-31 17:37:32,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:32,696 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-31 17:37:32,696 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:32,761 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:32,761 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-31 17:37:32,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:32,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:32,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:32,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:32,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:32,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:32,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:32,795 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:37:32,796 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-01-31 17:37:32,796 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:32,868 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:32,868 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-01-31 17:37:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:32,895 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:37:32,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:32,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:37:32,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-31 17:37:32,938 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:37:32,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:37:32,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:37:32,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-31 17:37:32,938 INFO L87 Difference]: Start difference. First operand 59 states and 243 transitions. Second operand 8 states. [2019-01-31 17:37:33,478 WARN L181 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2019-01-31 17:37:34,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:37:34,395 INFO L93 Difference]: Finished difference Result 99 states and 302 transitions. [2019-01-31 17:37:34,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-31 17:37:34,396 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:37:34,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:37:34,397 INFO L225 Difference]: With dead ends: 99 [2019-01-31 17:37:34,397 INFO L226 Difference]: Without dead ends: 98 [2019-01-31 17:37:34,398 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-31 17:37:34,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-01-31 17:37:34,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2019-01-31 17:37:34,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-01-31 17:37:34,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 261 transitions. [2019-01-31 17:37:34,414 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 261 transitions. Word has length 4 [2019-01-31 17:37:34,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:37:34,414 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 261 transitions. [2019-01-31 17:37:34,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:37:34,414 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 261 transitions. [2019-01-31 17:37:34,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:37:34,415 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:37:34,415 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:37:34,415 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:37:34,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:37:34,416 INFO L82 PathProgramCache]: Analyzing trace with hash 941660, now seen corresponding path program 1 times [2019-01-31 17:37:34,416 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:37:34,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:37:34,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:37:34,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:37:34,417 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:37:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:37:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:34,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:37:34,503 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:37:34,503 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:37:34,503 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [35] [2019-01-31 17:37:34,505 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:37:34,505 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:37:34,809 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:37:34,810 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. [2019-01-31 17:37:34,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:37:34,810 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:37:34,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:37:34,810 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:37:34,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:37:34,821 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:37:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:37:34,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:37:34,867 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 27 treesize of output 30 [2019-01-31 17:37:34,870 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 30 treesize of output 36 [2019-01-31 17:37:34,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:34,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:34,878 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 32 treesize of output 46 [2019-01-31 17:37:34,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:34,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:34,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:34,891 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:37:34,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:34,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:34,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:34,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:34,901 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:37:34,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:34,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:34,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:34,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:34,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:34,913 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:37:34,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:34,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:34,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:34,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:34,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:34,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:34,927 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:37:34,942 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:37:34,943 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:35,003 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:35,050 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:35,088 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:35,117 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:35,142 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:35,164 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:35,203 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:35,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,251 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:37:35,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,299 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:37:35,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,354 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:37:35,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,419 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:37:35,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,531 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:37:35,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,635 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:37:35,636 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:35,680 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:35,720 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:35,761 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:35,803 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:35,846 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:35,919 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:35,920 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-31 17:37:35,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:35,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-31 17:37:35,967 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:36,035 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:36,035 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-31 17:37:36,268 WARN L181 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2019-01-31 17:37:36,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:36,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:36,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:36,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:36,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:36,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:36,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:36,460 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:37:36,460 INFO L303 Elim1Store]: Index analysis took 185 ms [2019-01-31 17:37:36,461 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-01-31 17:37:36,462 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:37,195 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:37,196 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-01-31 17:37:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:37,392 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:37:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:37,858 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:37:37,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-31 17:37:37,858 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:37:37,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:37:37,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:37:37,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-31 17:37:37,859 INFO L87 Difference]: Start difference. First operand 61 states and 261 transitions. Second operand 8 states. [2019-01-31 17:37:38,415 WARN L181 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2019-01-31 17:37:39,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:37:39,031 INFO L93 Difference]: Finished difference Result 101 states and 320 transitions. [2019-01-31 17:37:39,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-31 17:37:39,031 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:37:39,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:37:39,033 INFO L225 Difference]: With dead ends: 101 [2019-01-31 17:37:39,033 INFO L226 Difference]: Without dead ends: 99 [2019-01-31 17:37:39,034 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-31 17:37:39,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-31 17:37:39,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 62. [2019-01-31 17:37:39,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-01-31 17:37:39,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 278 transitions. [2019-01-31 17:37:39,056 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 278 transitions. Word has length 4 [2019-01-31 17:37:39,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:37:39,056 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 278 transitions. [2019-01-31 17:37:39,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:37:39,056 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 278 transitions. [2019-01-31 17:37:39,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:37:39,057 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:37:39,057 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:37:39,057 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:37:39,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:37:39,058 INFO L82 PathProgramCache]: Analyzing trace with hash 941288, now seen corresponding path program 1 times [2019-01-31 17:37:39,058 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:37:39,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:37:39,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:37:39,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:37:39,059 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:37:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:37:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:39,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:37:39,158 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:37:39,158 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:37:39,158 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [35] [2019-01-31 17:37:39,159 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:37:39,159 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:37:39,484 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:37:39,485 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. [2019-01-31 17:37:39,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:37:39,485 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:37:39,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:37:39,485 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:37:39,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:37:39,496 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:37:39,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:37:39,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:37:39,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,553 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:37:39,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,633 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:37:39,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,685 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:37:39,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,754 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:37:39,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,841 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:37:39,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:39,944 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:37:39,945 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:39,988 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:40,031 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:40,075 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:40,119 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:40,162 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:40,219 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:37:40,223 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:37:40,226 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:37:40,230 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:37:40,233 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:37:40,236 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:37:40,241 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:37:40,252 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:37:40,252 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:40,306 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:40,350 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:40,383 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:40,408 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:40,430 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:40,448 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:40,463 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:40,536 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:40,537 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-31 17:37:40,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:40,590 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-31 17:37:40,591 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:40,658 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:40,659 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-31 17:37:40,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:40,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:40,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:40,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:40,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:40,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:40,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:40,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:40,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:40,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-31 17:37:40,694 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:40,765 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:40,765 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-31 17:37:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:40,823 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:37:40,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:40,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:37:40,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-31 17:37:40,868 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:37:40,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:37:40,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:37:40,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-01-31 17:37:40,869 INFO L87 Difference]: Start difference. First operand 62 states and 278 transitions. Second operand 8 states. [2019-01-31 17:37:41,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:37:41,546 INFO L93 Difference]: Finished difference Result 106 states and 350 transitions. [2019-01-31 17:37:41,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-31 17:37:41,546 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:37:41,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:37:41,547 INFO L225 Difference]: With dead ends: 106 [2019-01-31 17:37:41,548 INFO L226 Difference]: Without dead ends: 104 [2019-01-31 17:37:41,548 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-01-31 17:37:41,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-01-31 17:37:41,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 65. [2019-01-31 17:37:41,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-01-31 17:37:41,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 304 transitions. [2019-01-31 17:37:41,563 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 304 transitions. Word has length 4 [2019-01-31 17:37:41,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:37:41,564 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 304 transitions. [2019-01-31 17:37:41,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:37:41,564 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 304 transitions. [2019-01-31 17:37:41,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:37:41,565 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:37:41,565 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:37:41,565 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:37:41,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:37:41,566 INFO L82 PathProgramCache]: Analyzing trace with hash 941784, now seen corresponding path program 1 times [2019-01-31 17:37:41,566 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:37:41,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:37:41,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:37:41,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:37:41,567 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:37:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:37:41,872 WARN L181 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-01-31 17:37:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:42,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:37:42,087 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:37:42,087 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:37:42,088 INFO L207 CegarAbsIntRunner]: [0], [18], [30], [35] [2019-01-31 17:37:42,089 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:37:42,089 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:37:42,490 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:37:42,490 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. [2019-01-31 17:37:42,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:37:42,491 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:37:42,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:37:42,491 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:37:42,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:37:42,501 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:37:42,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:37:42,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:37:42,553 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 27 treesize of output 30 [2019-01-31 17:37:42,557 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 30 treesize of output 36 [2019-01-31 17:37:42,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:42,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:42,564 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 32 treesize of output 46 [2019-01-31 17:37:42,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:42,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:42,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:42,573 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:37:42,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:42,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:42,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:42,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:42,581 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:37:42,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:42,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:42,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:42,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:42,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:42,593 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 38 treesize of output 100 [2019-01-31 17:37:42,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:42,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:42,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:42,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:42,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:42,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:42,604 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:37:42,616 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:37:42,616 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:42,676 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:42,723 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:42,760 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:42,819 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:42,844 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:42,864 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:42,884 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:42,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:42,930 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:37:42,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:42,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:42,979 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:37:43,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:37:43,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,101 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:37:43,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,184 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:37:43,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,295 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:37:43,295 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:43,335 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:43,375 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:43,416 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:43,455 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:43,498 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:43,580 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:43,580 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-31 17:37:43,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,641 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-31 17:37:43,641 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:43,714 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:43,714 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-31 17:37:43,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:43,808 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-31 17:37:43,809 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:43,879 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:43,879 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-31 17:37:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:43,911 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:37:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:43,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:37:43,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-31 17:37:43,952 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:37:43,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:37:43,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:37:43,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-31 17:37:43,953 INFO L87 Difference]: Start difference. First operand 65 states and 304 transitions. Second operand 8 states. [2019-01-31 17:37:44,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:37:44,672 INFO L93 Difference]: Finished difference Result 107 states and 376 transitions. [2019-01-31 17:37:44,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-31 17:37:44,672 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:37:44,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:37:44,674 INFO L225 Difference]: With dead ends: 107 [2019-01-31 17:37:44,674 INFO L226 Difference]: Without dead ends: 99 [2019-01-31 17:37:44,675 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-31 17:37:44,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-31 17:37:44,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2019-01-31 17:37:44,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-01-31 17:37:44,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 328 transitions. [2019-01-31 17:37:44,688 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 328 transitions. Word has length 4 [2019-01-31 17:37:44,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:37:44,689 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 328 transitions. [2019-01-31 17:37:44,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:37:44,689 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 328 transitions. [2019-01-31 17:37:44,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:37:44,690 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:37:44,690 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:37:44,690 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:37:44,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:37:44,691 INFO L82 PathProgramCache]: Analyzing trace with hash 930314, now seen corresponding path program 1 times [2019-01-31 17:37:44,691 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:37:44,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:37:44,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:37:44,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:37:44,692 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:37:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:37:44,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:44,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:37:44,827 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:37:44,827 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:37:44,827 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [35] [2019-01-31 17:37:44,829 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:37:44,829 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:37:45,424 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:37:45,424 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-31 17:37:45,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:37:45,425 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:37:45,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:37:45,425 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:37:45,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:37:45,435 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:37:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:37:45,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:37:45,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,480 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:37:45,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,535 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:37:45,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,590 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:37:45,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,656 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:37:45,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,739 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:37:45,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:45,844 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:37:45,845 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:45,887 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:45,930 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:45,974 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:46,018 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:46,065 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:46,118 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:37:46,121 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:37:46,124 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:37:46,127 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:37:46,131 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:37:46,135 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:37:46,139 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:37:46,151 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:37:46,152 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:46,208 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:46,309 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:46,518 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:46,545 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:46,566 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:46,585 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:46,602 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:46,675 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:46,676 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-31 17:37:46,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:46,728 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 135 [2019-01-31 17:37:46,730 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-31 17:37:46,970 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 12 dim-0 vars, and 2 xjuncts. [2019-01-31 17:37:46,970 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:201 [2019-01-31 17:37:47,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:47,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:47,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:47,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:47,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:47,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:47,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:47,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:47,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:47,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:47,149 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 25 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 12 case distinctions, treesize of input 111 treesize of output 165 [2019-01-31 17:37:47,150 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-01-31 17:37:47,169 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 64 xjuncts. [2019-01-31 17:37:48,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:48,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:48,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:48,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:48,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:48,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:48,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:48,244 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:37:48,245 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 126 [2019-01-31 17:37:48,246 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:48,676 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 2 dim-1 vars, End of recursive call: 49 dim-0 vars, and 8 xjuncts. [2019-01-31 17:37:48,677 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:218, output treesize:686 [2019-01-31 17:37:49,614 WARN L181 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 114 [2019-01-31 17:37:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:49,616 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:37:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:49,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:37:49,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2019-01-31 17:37:49,643 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:37:49,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:37:49,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:37:49,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-01-31 17:37:49,644 INFO L87 Difference]: Start difference. First operand 66 states and 328 transitions. Second operand 8 states. [2019-01-31 17:37:50,447 WARN L181 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 117 [2019-01-31 17:37:53,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:37:53,580 INFO L93 Difference]: Finished difference Result 155 states and 556 transitions. [2019-01-31 17:37:53,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-31 17:37:53,580 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:37:53,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:37:53,582 INFO L225 Difference]: With dead ends: 155 [2019-01-31 17:37:53,582 INFO L226 Difference]: Without dead ends: 152 [2019-01-31 17:37:53,582 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-01-31 17:37:53,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-01-31 17:37:53,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 78. [2019-01-31 17:37:53,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-01-31 17:37:53,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 438 transitions. [2019-01-31 17:37:53,602 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 438 transitions. Word has length 4 [2019-01-31 17:37:53,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:37:53,602 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 438 transitions. [2019-01-31 17:37:53,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:37:53,603 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 438 transitions. [2019-01-31 17:37:53,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:37:53,603 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:37:53,604 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:37:53,604 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:37:53,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:37:53,604 INFO L82 PathProgramCache]: Analyzing trace with hash 930440, now seen corresponding path program 1 times [2019-01-31 17:37:53,604 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:37:53,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:37:53,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:37:53,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:37:53,605 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:37:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:37:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:53,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:37:53,667 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:37:53,667 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:37:53,667 INFO L207 CegarAbsIntRunner]: [0], [6], [36], [37] [2019-01-31 17:37:53,668 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:37:53,668 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:37:53,834 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:37:53,834 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. [2019-01-31 17:37:53,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:37:53,834 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:37:53,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:37:53,834 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:37:53,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:37:53,843 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:37:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:37:53,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:37:53,883 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 27 treesize of output 30 [2019-01-31 17:37:53,885 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:37:53,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:53,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:53,895 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 32 treesize of output 46 [2019-01-31 17:37:53,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:53,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:53,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:53,902 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 34 treesize of output 60 [2019-01-31 17:37:53,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:53,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:53,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:53,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:53,918 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 36 treesize of output 78 [2019-01-31 17:37:53,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:53,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:53,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:53,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:53,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:53,931 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 38 treesize of output 100 [2019-01-31 17:37:53,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:53,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:53,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:53,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:53,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:53,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:53,948 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:37:53,968 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:37:53,968 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:54,029 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:54,076 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:54,113 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:54,140 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:54,164 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:54,183 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:54,201 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:54,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,251 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:37:54,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,301 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:37:54,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,355 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 63 treesize of output 86 [2019-01-31 17:37:54,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,422 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:37:54,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,504 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:37:54,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,619 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:37:54,620 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:54,660 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:54,700 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:54,742 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:54,784 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:54,827 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:54,901 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:54,902 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-31 17:37:54,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:54,938 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-31 17:37:54,938 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:55,007 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:55,007 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-31 17:37:55,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:55,029 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:37:55,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:55,059 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:37:55,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-31 17:37:55,059 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:37:55,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-31 17:37:55,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-31 17:37:55,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-31 17:37:55,060 INFO L87 Difference]: Start difference. First operand 78 states and 438 transitions. Second operand 6 states. [2019-01-31 17:37:55,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:37:55,395 INFO L93 Difference]: Finished difference Result 104 states and 471 transitions. [2019-01-31 17:37:55,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-31 17:37:55,396 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-31 17:37:55,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:37:55,398 INFO L225 Difference]: With dead ends: 104 [2019-01-31 17:37:55,398 INFO L226 Difference]: Without dead ends: 103 [2019-01-31 17:37:55,398 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-31 17:37:55,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-01-31 17:37:55,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2019-01-31 17:37:55,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-01-31 17:37:55,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-01-31 17:37:55,418 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-01-31 17:37:55,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:37:55,418 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-01-31 17:37:55,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-31 17:37:55,418 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-01-31 17:37:55,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:37:55,419 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:37:55,419 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:37:55,420 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:37:55,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:37:55,420 INFO L82 PathProgramCache]: Analyzing trace with hash 945816, now seen corresponding path program 1 times [2019-01-31 17:37:55,420 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:37:55,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:37:55,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:37:55,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:37:55,421 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:37:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:37:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:55,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:37:55,486 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:37:55,486 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:37:55,486 INFO L207 CegarAbsIntRunner]: [0], [22], [36], [37] [2019-01-31 17:37:55,487 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:37:55,487 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:37:55,789 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:37:55,790 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. [2019-01-31 17:37:55,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:37:55,790 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:37:55,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:37:55,790 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:37:55,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:37:55,807 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:37:55,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:37:55,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:37:55,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:37:55,886 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-31 17:37:55,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:55,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:55,969 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-31 17:37:56,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,022 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-31 17:37:56,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,033 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-31 17:37:56,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,051 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-31 17:37:56,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,067 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-31 17:37:56,081 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-31 17:37:56,081 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:56,141 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:56,187 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:56,223 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:56,252 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:56,286 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:56,306 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:56,323 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:56,363 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-31 17:37:56,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,386 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 73 treesize of output 80 [2019-01-31 17:37:56,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,435 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-31 17:37:56,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,501 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-31 17:37:56,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,582 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-31 17:37:56,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,682 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-31 17:37:56,682 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:56,720 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:56,759 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:56,798 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:56,838 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:56,881 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:56,951 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:56,952 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-31 17:37:56,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:56,988 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-31 17:37:56,988 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:57,054 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:57,054 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-31 17:37:57,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:57,074 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:37:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:57,104 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:37:57,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-31 17:37:57,104 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:37:57,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-31 17:37:57,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-31 17:37:57,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-31 17:37:57,105 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 6 states. [2019-01-31 17:37:57,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:37:57,418 INFO L93 Difference]: Finished difference Result 108 states and 483 transitions. [2019-01-31 17:37:57,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-31 17:37:57,419 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-31 17:37:57,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:37:57,421 INFO L225 Difference]: With dead ends: 108 [2019-01-31 17:37:57,421 INFO L226 Difference]: Without dead ends: 107 [2019-01-31 17:37:57,421 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-31 17:37:57,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-01-31 17:37:57,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2019-01-31 17:37:57,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-01-31 17:37:57,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-01-31 17:37:57,440 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-01-31 17:37:57,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:37:57,441 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-01-31 17:37:57,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-31 17:37:57,441 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-01-31 17:37:57,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:37:57,441 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:37:57,441 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:37:57,442 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:37:57,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:37:57,442 INFO L82 PathProgramCache]: Analyzing trace with hash 945008, now seen corresponding path program 1 times [2019-01-31 17:37:57,442 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:37:57,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:37:57,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:37:57,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:37:57,443 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:37:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:37:57,639 WARN L181 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2019-01-31 17:37:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:57,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:37:57,666 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:37:57,666 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:37:57,666 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [35] [2019-01-31 17:37:57,667 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:37:57,668 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:37:57,964 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:37:57,965 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. [2019-01-31 17:37:57,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:37:57,965 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:37:57,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:37:57,965 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:37:57,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:37:57,977 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:37:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:37:57,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:37:58,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,053 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:37:58,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,107 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:37:58,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,161 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:37:58,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,232 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:37:58,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,313 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:37:58,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:58,418 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:37:58,419 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:58,462 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:58,505 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:58,549 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:58,594 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:58,639 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:58,697 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:37:58,700 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:37:58,703 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:37:58,707 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:37:58,721 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:37:58,725 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:37:58,729 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:37:58,743 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:37:58,744 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:58,803 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:58,846 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:58,881 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:58,908 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:58,927 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:58,946 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:58,963 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:37:59,047 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:59,048 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-31 17:37:59,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:59,100 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-31 17:37:59,101 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:59,170 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:59,171 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-31 17:37:59,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:59,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:59,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:59,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:59,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:59,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:59,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:59,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:59,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:37:59,362 INFO L303 Elim1Store]: Index analysis took 159 ms [2019-01-31 17:37:59,363 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-31 17:37:59,364 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:37:59,435 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:37:59,436 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-31 17:37:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:59,460 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:37:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:37:59,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:37:59,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-31 17:37:59,514 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:37:59,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:37:59,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:37:59,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-01-31 17:37:59,514 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 8 states. [2019-01-31 17:38:01,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:38:01,071 INFO L93 Difference]: Finished difference Result 154 states and 652 transitions. [2019-01-31 17:38:01,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-31 17:38:01,074 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:38:01,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:38:01,077 INFO L225 Difference]: With dead ends: 154 [2019-01-31 17:38:01,077 INFO L226 Difference]: Without dead ends: 153 [2019-01-31 17:38:01,077 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-01-31 17:38:01,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-01-31 17:38:01,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 92. [2019-01-31 17:38:01,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-01-31 17:38:01,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 556 transitions. [2019-01-31 17:38:01,101 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 556 transitions. Word has length 4 [2019-01-31 17:38:01,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:38:01,101 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 556 transitions. [2019-01-31 17:38:01,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:38:01,102 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 556 transitions. [2019-01-31 17:38:01,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:38:01,102 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:38:01,102 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:38:01,103 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:38:01,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:38:01,103 INFO L82 PathProgramCache]: Analyzing trace with hash 945504, now seen corresponding path program 1 times [2019-01-31 17:38:01,103 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:38:01,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:38:01,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:38:01,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:38:01,104 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:38:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:38:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:01,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:38:01,271 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:38:01,271 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:38:01,272 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [35] [2019-01-31 17:38:01,272 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:38:01,273 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:38:01,545 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:38:01,545 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. [2019-01-31 17:38:01,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:38:01,546 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:38:01,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:38:01,546 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:38:01,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:38:01,555 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:38:01,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:38:01,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:38:01,613 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 27 treesize of output 30 [2019-01-31 17:38:01,617 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 30 treesize of output 36 [2019-01-31 17:38:01,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:01,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:01,623 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 32 treesize of output 46 [2019-01-31 17:38:01,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:01,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:01,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:01,630 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 34 treesize of output 60 [2019-01-31 17:38:01,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:01,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:01,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:01,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:01,638 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:38:01,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:01,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:01,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:01,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:01,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:01,648 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 38 treesize of output 100 [2019-01-31 17:38:01,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:01,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:01,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:01,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:01,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:01,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:01,666 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:38:01,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:38:01,680 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:01,740 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:01,788 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:01,827 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:01,856 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:01,881 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:01,900 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:01,916 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:01,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:01,963 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:38:02,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:38:02,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,067 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:38:02,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,131 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:38:02,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,215 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:38:02,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,323 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:38:02,324 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:02,366 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:02,407 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:02,449 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:02,491 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:02,534 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:02,608 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:38:02,609 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-31 17:38:02,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,658 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-31 17:38:02,659 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:02,728 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:38:02,729 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-31 17:38:02,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:02,764 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-31 17:38:02,765 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:02,837 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:38:02,837 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-31 17:38:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:02,860 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:38:02,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:02,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:38:02,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-31 17:38:02,912 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:38:02,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:38:02,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:38:02,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-31 17:38:02,913 INFO L87 Difference]: Start difference. First operand 92 states and 556 transitions. Second operand 8 states. [2019-01-31 17:38:03,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:38:03,637 INFO L93 Difference]: Finished difference Result 148 states and 688 transitions. [2019-01-31 17:38:03,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-31 17:38:03,637 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:38:03,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:38:03,640 INFO L225 Difference]: With dead ends: 148 [2019-01-31 17:38:03,640 INFO L226 Difference]: Without dead ends: 146 [2019-01-31 17:38:03,641 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-31 17:38:03,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-01-31 17:38:03,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2019-01-31 17:38:03,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-01-31 17:38:03,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 590 transitions. [2019-01-31 17:38:03,660 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 590 transitions. Word has length 4 [2019-01-31 17:38:03,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:38:03,660 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 590 transitions. [2019-01-31 17:38:03,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:38:03,660 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 590 transitions. [2019-01-31 17:38:03,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:38:03,661 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:38:03,661 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:38:03,661 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:38:03,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:38:03,661 INFO L82 PathProgramCache]: Analyzing trace with hash 933972, now seen corresponding path program 1 times [2019-01-31 17:38:03,662 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:38:03,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:38:03,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:38:03,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:38:03,662 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:38:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:38:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:03,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:38:03,774 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:38:03,774 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:38:03,774 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [35] [2019-01-31 17:38:03,775 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:38:03,775 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:38:04,021 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:38:04,021 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. [2019-01-31 17:38:04,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:38:04,021 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:38:04,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:38:04,022 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:38:04,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:38:04,030 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:38:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:38:04,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:38:04,068 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 30 [2019-01-31 17:38:04,074 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 30 treesize of output 36 [2019-01-31 17:38:04,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,084 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:38:04,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,095 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:38:04,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,110 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:38:04,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,134 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 38 treesize of output 100 [2019-01-31 17:38:04,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,165 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:38:04,186 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:38:04,187 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:04,261 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:04,312 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:04,347 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:04,375 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:04,401 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:04,422 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:04,440 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:04,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,488 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:38:04,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,535 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:38:04,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,590 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:38:04,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,655 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:38:04,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,739 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:38:04,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:04,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:38:04,845 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:04,887 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:04,929 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:04,971 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:05,013 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:05,056 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:05,129 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:38:05,130 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-31 17:38:05,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:05,184 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-31 17:38:05,184 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:05,254 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:38:05,255 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-31 17:38:05,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:05,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:05,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:05,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:05,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:05,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:05,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:05,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:05,288 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:38:05,289 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 141 [2019-01-31 17:38:05,289 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:05,362 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:38:05,362 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:82 [2019-01-31 17:38:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:05,385 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:38:05,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:05,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:38:05,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-31 17:38:05,427 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:38:05,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:38:05,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:38:05,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-31 17:38:05,427 INFO L87 Difference]: Start difference. First operand 103 states and 590 transitions. Second operand 8 states. [2019-01-31 17:38:05,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:38:05,942 INFO L93 Difference]: Finished difference Result 145 states and 646 transitions. [2019-01-31 17:38:05,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-31 17:38:05,943 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:38:05,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:38:05,945 INFO L225 Difference]: With dead ends: 145 [2019-01-31 17:38:05,945 INFO L226 Difference]: Without dead ends: 143 [2019-01-31 17:38:05,946 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-31 17:38:05,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-01-31 17:38:05,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2019-01-31 17:38:05,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-01-31 17:38:05,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 599 transitions. [2019-01-31 17:38:05,967 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 599 transitions. Word has length 4 [2019-01-31 17:38:05,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:38:05,967 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 599 transitions. [2019-01-31 17:38:05,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:38:05,967 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 599 transitions. [2019-01-31 17:38:05,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:38:05,968 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:38:05,968 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:38:05,968 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:38:05,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:38:05,969 INFO L82 PathProgramCache]: Analyzing trace with hash 938128, now seen corresponding path program 1 times [2019-01-31 17:38:05,969 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:38:05,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:38:05,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:38:05,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:38:05,970 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:38:05,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:38:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:06,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:38:06,154 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:38:06,154 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:38:06,154 INFO L207 CegarAbsIntRunner]: [0], [14], [36], [37] [2019-01-31 17:38:06,155 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:38:06,156 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:38:06,355 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:38:06,355 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. [2019-01-31 17:38:06,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:38:06,355 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:38:06,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:38:06,356 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:38:06,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:38:06,365 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:38:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:38:06,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:38:06,374 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:38:06,382 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-31 17:38:06,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,393 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-31 17:38:06,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,407 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-31 17:38:06,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,426 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-31 17:38:06,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,445 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-31 17:38:06,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,457 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-31 17:38:06,471 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-31 17:38:06,472 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:06,533 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:06,579 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:06,616 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:06,644 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:06,668 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:06,688 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:06,706 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:06,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-31 17:38:06,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,771 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-31 17:38:06,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,824 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-31 17:38:06,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,883 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-31 17:38:06,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:06,962 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-31 17:38:07,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:07,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:07,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:07,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:07,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:07,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:07,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:07,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:07,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:07,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:07,064 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-31 17:38:07,064 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:07,102 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:07,141 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:07,181 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:07,221 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:07,264 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:07,345 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:38:07,345 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-31 17:38:07,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:07,380 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-31 17:38:07,381 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:07,445 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:38:07,445 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-31 17:38:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:07,493 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:38:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:07,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:38:07,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-31 17:38:07,525 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:38:07,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-31 17:38:07,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-31 17:38:07,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-31 17:38:07,525 INFO L87 Difference]: Start difference. First operand 104 states and 599 transitions. Second operand 6 states. [2019-01-31 17:38:08,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:38:08,014 INFO L93 Difference]: Finished difference Result 124 states and 613 transitions. [2019-01-31 17:38:08,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-31 17:38:08,014 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-31 17:38:08,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:38:08,016 INFO L225 Difference]: With dead ends: 124 [2019-01-31 17:38:08,016 INFO L226 Difference]: Without dead ends: 123 [2019-01-31 17:38:08,017 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-31 17:38:08,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-01-31 17:38:08,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2019-01-31 17:38:08,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-01-31 17:38:08,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 598 transitions. [2019-01-31 17:38:08,034 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 598 transitions. Word has length 4 [2019-01-31 17:38:08,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:38:08,034 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 598 transitions. [2019-01-31 17:38:08,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-31 17:38:08,034 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 598 transitions. [2019-01-31 17:38:08,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:38:08,035 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:38:08,035 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:38:08,035 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:38:08,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:38:08,035 INFO L82 PathProgramCache]: Analyzing trace with hash 937816, now seen corresponding path program 1 times [2019-01-31 17:38:08,036 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:38:08,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:38:08,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:38:08,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:38:08,036 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:38:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:38:08,579 WARN L181 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2019-01-31 17:38:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:08,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:38:08,680 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:38:08,680 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:38:08,680 INFO L207 CegarAbsIntRunner]: [0], [14], [26], [35] [2019-01-31 17:38:08,682 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:38:08,682 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:38:08,974 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:38:08,974 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. [2019-01-31 17:38:08,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:38:08,974 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:38:08,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:38:08,974 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:38:08,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:38:08,982 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:38:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:38:08,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:38:09,023 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 27 treesize of output 30 [2019-01-31 17:38:09,025 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 30 treesize of output 36 [2019-01-31 17:38:09,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,036 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:38:09,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,047 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 34 treesize of output 60 [2019-01-31 17:38:09,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,062 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 36 treesize of output 78 [2019-01-31 17:38:09,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,080 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:38:09,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,111 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:38:09,130 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:38:09,131 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:09,201 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:09,246 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:09,282 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:09,311 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:09,336 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:09,354 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:09,374 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:09,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,422 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:38:09,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:38:09,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,526 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:38:09,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,593 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:38:09,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,677 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:38:09,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:09,781 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:38:09,782 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:09,822 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:09,863 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:09,905 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:09,947 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:09,989 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:10,063 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:38:10,063 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-31 17:38:10,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:10,153 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-31 17:38:10,153 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:10,219 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:38:10,219 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-31 17:38:10,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:10,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:10,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:10,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:10,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:10,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:10,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:10,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:10,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:10,327 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-31 17:38:10,328 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:10,399 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:38:10,400 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-31 17:38:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:10,423 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:38:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:10,471 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:38:10,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-31 17:38:10,471 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:38:10,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:38:10,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:38:10,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-31 17:38:10,472 INFO L87 Difference]: Start difference. First operand 104 states and 598 transitions. Second operand 8 states. [2019-01-31 17:38:11,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:38:11,375 INFO L93 Difference]: Finished difference Result 176 states and 800 transitions. [2019-01-31 17:38:11,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-31 17:38:11,376 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:38:11,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:38:11,378 INFO L225 Difference]: With dead ends: 176 [2019-01-31 17:38:11,378 INFO L226 Difference]: Without dead ends: 174 [2019-01-31 17:38:11,379 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-01-31 17:38:11,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-01-31 17:38:11,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 108. [2019-01-31 17:38:11,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-01-31 17:38:11,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-01-31 17:38:11,403 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-01-31 17:38:11,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:38:11,404 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-01-31 17:38:11,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:38:11,404 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-01-31 17:38:11,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:38:11,404 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:38:11,404 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:38:11,405 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:38:11,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:38:11,405 INFO L82 PathProgramCache]: Analyzing trace with hash 953504, now seen corresponding path program 1 times [2019-01-31 17:38:11,405 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:38:11,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:38:11,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:38:11,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:38:11,406 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:38:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:38:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:11,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:38:11,552 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:38:11,552 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:38:11,552 INFO L207 CegarAbsIntRunner]: [0], [30], [36], [37] [2019-01-31 17:38:11,553 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:38:11,553 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:38:11,732 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:38:11,732 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. [2019-01-31 17:38:11,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:38:11,733 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:38:11,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:38:11,733 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:38:11,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:38:11,742 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:38:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:38:11,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:38:11,754 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-31 17:38:11,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:11,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:11,794 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 73 treesize of output 80 [2019-01-31 17:38:11,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:11,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:11,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:11,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:11,852 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-31 17:38:11,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:11,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:11,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:11,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:11,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:11,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:11,913 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-31 17:38:11,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:11,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:11,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:11,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:11,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:11,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:11,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:11,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:11,994 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-31 17:38:12,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:12,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:12,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:12,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:12,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:12,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:12,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:12,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:12,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:12,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:12,096 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-31 17:38:12,096 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:12,135 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:12,176 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:12,216 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:12,257 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:12,302 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:12,354 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 27 treesize of output 30 [2019-01-31 17:38:12,361 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-31 17:38:12,367 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-31 17:38:12,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-31 17:38:12,382 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-31 17:38:12,388 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-31 17:38:12,394 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-31 17:38:12,409 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-31 17:38:12,410 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:12,469 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:12,511 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:12,540 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:12,563 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:12,582 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:12,599 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:12,616 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:12,686 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:38:12,687 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-31 17:38:12,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:12,727 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-31 17:38:12,728 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:12,802 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:38:12,803 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-31 17:38:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:12,850 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:38:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:12,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:38:12,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-31 17:38:12,881 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:38:12,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-31 17:38:12,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-31 17:38:12,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-31 17:38:12,882 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 6 states. [2019-01-31 17:38:13,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:38:13,180 INFO L93 Difference]: Finished difference Result 135 states and 696 transitions. [2019-01-31 17:38:13,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-31 17:38:13,180 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-31 17:38:13,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:38:13,182 INFO L225 Difference]: With dead ends: 135 [2019-01-31 17:38:13,182 INFO L226 Difference]: Without dead ends: 134 [2019-01-31 17:38:13,183 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-31 17:38:13,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-01-31 17:38:13,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 108. [2019-01-31 17:38:13,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-01-31 17:38:13,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-01-31 17:38:13,206 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-01-31 17:38:13,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:38:13,206 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-01-31 17:38:13,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-31 17:38:13,206 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-01-31 17:38:13,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-31 17:38:13,207 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:38:13,207 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-31 17:38:13,207 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:38:13,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:38:13,207 INFO L82 PathProgramCache]: Analyzing trace with hash 29600478, now seen corresponding path program 1 times [2019-01-31 17:38:13,207 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:38:13,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:38:13,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:38:13,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:38:13,208 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:38:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:38:13,417 WARN L181 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 16 [2019-01-31 17:38:13,623 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 5 [2019-01-31 17:38:13,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:13,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:38:13,624 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:38:13,625 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-31 17:38:13,625 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [32], [35] [2019-01-31 17:38:13,626 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:38:13,626 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:38:14,298 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:38:14,299 INFO L272 AbstractInterpreter]: Visited 5 different actions 13 times. Merged at 2 different actions 2 times. Never widened. Found 9 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-31 17:38:14,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:38:14,299 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:38:14,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:38:14,299 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:38:14,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:38:14,315 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:38:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:38:14,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:38:14,362 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 30 [2019-01-31 17:38:14,364 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 30 treesize of output 36 [2019-01-31 17:38:14,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,374 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 32 treesize of output 46 [2019-01-31 17:38:14,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:38:14,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,398 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:38:14,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,417 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:38:14,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,435 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:38:14,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,459 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-31 17:38:14,460 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:14,543 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:14,590 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:14,625 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:14,655 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:14,681 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:14,701 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:14,720 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:14,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,772 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 117 treesize of output 114 [2019-01-31 17:38:14,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,826 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 101 treesize of output 104 [2019-01-31 17:38:14,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,889 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 83 treesize of output 103 [2019-01-31 17:38:14,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:14,963 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-31 17:38:15,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,054 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-31 17:38:15,156 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-31 17:38:15,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,172 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-31 17:38:15,303 WARN L181 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-31 17:38:15,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,320 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-31 17:38:15,321 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:15,378 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:15,437 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:15,497 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:15,559 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:15,618 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:15,682 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:15,779 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-31 17:38:15,780 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-31 17:38:15,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,818 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-31 17:38:15,819 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:15,916 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:38:15,916 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-31 17:38:15,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:15,964 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:38:15,965 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-31 17:38:15,966 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:16,065 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:38:16,066 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-31 17:38:16,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:16,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:16,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:16,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:16,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:16,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:16,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:16,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:16,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:16,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:16,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:16,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:16,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:16,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:16,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:16,124 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 169 [2019-01-31 17:38:16,125 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:16,222 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-31 17:38:16,223 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:89 [2019-01-31 17:38:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:16,252 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:38:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:16,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:38:16,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-31 17:38:16,308 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:38:16,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-31 17:38:16,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-31 17:38:16,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2019-01-31 17:38:16,309 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 10 states. [2019-01-31 17:38:17,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:38:17,404 INFO L93 Difference]: Finished difference Result 212 states and 968 transitions. [2019-01-31 17:38:17,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-31 17:38:17,404 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-31 17:38:17,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:38:17,407 INFO L225 Difference]: With dead ends: 212 [2019-01-31 17:38:17,408 INFO L226 Difference]: Without dead ends: 205 [2019-01-31 17:38:17,408 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-31 17:38:17,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-01-31 17:38:17,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 122. [2019-01-31 17:38:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-01-31 17:38:17,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 789 transitions. [2019-01-31 17:38:17,442 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 789 transitions. Word has length 5 [2019-01-31 17:38:17,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:38:17,442 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 789 transitions. [2019-01-31 17:38:17,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-31 17:38:17,443 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 789 transitions. [2019-01-31 17:38:17,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-31 17:38:17,443 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:38:17,443 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-31 17:38:17,444 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:38:17,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:38:17,444 INFO L82 PathProgramCache]: Analyzing trace with hash 29600106, now seen corresponding path program 1 times [2019-01-31 17:38:17,444 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:38:17,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:38:17,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:38:17,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:38:17,445 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:38:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:38:17,696 WARN L181 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-01-31 17:38:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:17,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:38:17,730 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:38:17,730 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-31 17:38:17,730 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [32], [35] [2019-01-31 17:38:17,731 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:38:17,731 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:38:18,424 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:38:18,425 INFO L272 AbstractInterpreter]: Visited 5 different actions 13 times. Merged at 2 different actions 2 times. Never widened. Found 9 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-31 17:38:18,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:38:18,425 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:38:18,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:38:18,425 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:38:18,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:38:18,434 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:38:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:38:18,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:38:18,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,485 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-31 17:38:18,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,554 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-31 17:38:18,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,619 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-31 17:38:18,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,706 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-31 17:38:18,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,810 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-31 17:38:18,920 WARN L181 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-31 17:38:18,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:18,953 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-31 17:38:19,089 WARN L181 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-31 17:38:19,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:19,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:19,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:19,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:19,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:19,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:19,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:19,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:19,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:19,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:19,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:19,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:19,114 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-31 17:38:19,115 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:19,182 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:19,249 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:19,323 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:19,397 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:19,472 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:19,552 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:19,636 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:38:19,640 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:38:19,643 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:38:19,645 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:38:19,648 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:38:19,652 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:38:19,656 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:38:19,660 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-31 17:38:19,661 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:19,737 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:19,780 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:19,813 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:19,838 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:19,858 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:19,875 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:19,893 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:19,992 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-31 17:38:19,993 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-31 17:38:20,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:20,032 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-31 17:38:20,033 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:20,131 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:38:20,131 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-31 17:38:20,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:20,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:20,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:20,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:20,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:20,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:20,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:20,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:20,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:20,179 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:38:20,180 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-31 17:38:20,181 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:20,280 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:38:20,280 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-31 17:38:30,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:30,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:30,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:30,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:30,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:30,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:30,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:30,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:30,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:30,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:30,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:30,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:30,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:30,366 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:38:30,367 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2019-01-31 17:38:30,368 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:30,466 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-31 17:38:30,466 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-01-31 17:38:30,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:30,511 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:38:30,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:30,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:38:30,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-31 17:38:30,570 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:38:30,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-31 17:38:30,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-31 17:38:30,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=114, Unknown=1, NotChecked=0, Total=182 [2019-01-31 17:38:30,571 INFO L87 Difference]: Start difference. First operand 122 states and 789 transitions. Second operand 10 states. [2019-01-31 17:38:32,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:38:32,630 INFO L93 Difference]: Finished difference Result 169 states and 850 transitions. [2019-01-31 17:38:32,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-31 17:38:32,630 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-31 17:38:32,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:38:32,633 INFO L225 Difference]: With dead ends: 169 [2019-01-31 17:38:32,633 INFO L226 Difference]: Without dead ends: 168 [2019-01-31 17:38:32,634 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=100, Invalid=171, Unknown=1, NotChecked=0, Total=272 [2019-01-31 17:38:32,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-01-31 17:38:32,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2019-01-31 17:38:32,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-01-31 17:38:32,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 762 transitions. [2019-01-31 17:38:32,682 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 762 transitions. Word has length 5 [2019-01-31 17:38:32,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:38:32,682 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 762 transitions. [2019-01-31 17:38:32,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-31 17:38:32,682 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 762 transitions. [2019-01-31 17:38:32,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-31 17:38:32,683 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:38:32,683 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-31 17:38:32,683 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:38:32,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:38:32,684 INFO L82 PathProgramCache]: Analyzing trace with hash 29600602, now seen corresponding path program 1 times [2019-01-31 17:38:32,684 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:38:32,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:38:32,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:38:32,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:38:32,685 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:38:32,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:38:32,966 WARN L181 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2019-01-31 17:38:33,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:33,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:38:33,005 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:38:33,006 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-31 17:38:33,006 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [32], [35] [2019-01-31 17:38:33,007 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:38:33,007 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:38:33,776 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:38:33,777 INFO L272 AbstractInterpreter]: Visited 5 different actions 13 times. Merged at 2 different actions 2 times. Never widened. Found 9 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-31 17:38:33,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:38:33,777 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:38:33,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:38:33,777 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:38:33,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:38:33,787 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:38:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:38:33,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:38:33,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:33,844 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 117 treesize of output 114 [2019-01-31 17:38:33,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:33,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:33,908 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 101 treesize of output 104 [2019-01-31 17:38:33,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:33,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:33,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:33,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:33,971 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-31 17:38:34,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,046 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 68 treesize of output 105 [2019-01-31 17:38:34,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,137 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-31 17:38:34,240 WARN L181 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-31 17:38:34,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,256 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-31 17:38:34,388 WARN L181 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-31 17:38:34,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:34,406 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-31 17:38:34,407 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:34,466 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:34,529 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:34,599 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:34,667 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:34,737 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:34,807 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:34,887 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:38:34,890 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:38:34,894 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:38:34,899 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:38:34,901 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:38:34,906 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:38:34,910 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:38:34,914 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-31 17:38:34,915 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:34,993 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:35,038 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:35,073 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:35,098 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:35,119 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:35,137 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:35,153 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:35,255 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-31 17:38:35,255 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-31 17:38:35,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:35,297 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-31 17:38:35,298 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:35,404 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. [2019-01-31 17:38:35,404 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-31 17:38:35,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:35,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:35,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:35,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:35,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:35,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:35,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:35,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:35,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:35,450 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:38:35,451 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-31 17:38:35,452 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:35,551 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:38:35,552 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-31 17:38:35,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:35,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:35,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:35,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:35,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:35,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:35,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:35,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:35,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:35,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:35,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:35,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:35,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:35,602 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:38:35,603 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2019-01-31 17:38:35,604 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:35,700 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-31 17:38:35,701 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-01-31 17:38:35,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:35,772 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:38:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:35,849 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:38:35,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-31 17:38:35,849 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:38:35,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-31 17:38:35,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-31 17:38:35,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-31 17:38:35,850 INFO L87 Difference]: Start difference. First operand 119 states and 762 transitions. Second operand 10 states. [2019-01-31 17:38:37,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:38:37,404 INFO L93 Difference]: Finished difference Result 176 states and 845 transitions. [2019-01-31 17:38:37,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-31 17:38:37,405 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-31 17:38:37,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:38:37,408 INFO L225 Difference]: With dead ends: 176 [2019-01-31 17:38:37,408 INFO L226 Difference]: Without dead ends: 172 [2019-01-31 17:38:37,409 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-31 17:38:37,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-01-31 17:38:37,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 125. [2019-01-31 17:38:37,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-01-31 17:38:37,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 788 transitions. [2019-01-31 17:38:37,440 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 788 transitions. Word has length 5 [2019-01-31 17:38:37,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:38:37,440 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 788 transitions. [2019-01-31 17:38:37,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-31 17:38:37,440 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 788 transitions. [2019-01-31 17:38:37,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-31 17:38:37,441 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:38:37,441 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-31 17:38:37,441 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:38:37,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:38:37,442 INFO L82 PathProgramCache]: Analyzing trace with hash 29588822, now seen corresponding path program 1 times [2019-01-31 17:38:37,442 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:38:37,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:38:37,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:38:37,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:38:37,443 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:38:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:38:37,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:37,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:38:37,636 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:38:37,636 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-31 17:38:37,636 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [32], [35] [2019-01-31 17:38:37,637 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:38:37,637 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:38:38,307 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:38:38,307 INFO L272 AbstractInterpreter]: Visited 5 different actions 13 times. Merged at 2 different actions 2 times. Never widened. Found 9 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-31 17:38:38,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:38:38,308 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:38:38,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:38:38,308 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:38:38,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:38:38,316 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:38:38,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:38:38,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:38:38,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,357 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:38:38,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,415 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:38:38,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,468 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:38:38,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,534 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:38:38,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,617 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:38:38,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:38,724 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:38:38,724 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:38,763 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:38,807 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:38,852 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:38,895 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:38,941 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:38,994 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:38:39,014 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:38:39,023 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:38:39,026 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:38:39,029 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:38:39,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:38:39,037 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:38:39,047 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:38:39,048 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:39,107 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:39,151 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:39,185 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:39,210 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:39,245 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:39,262 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:39,279 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:38:39,353 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:38:39,354 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-31 17:38:39,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:39,458 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2019-01-31 17:38:39,459 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-31 17:38:39,493 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-31 17:38:41,111 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2019-01-31 17:38:41,111 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:886 [2019-01-31 17:38:43,946 WARN L181 SmtUtils]: Spent 2.57 s on a formula simplification. DAG size of input: 451 DAG size of output: 175 [2019-01-31 17:38:43,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:43,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:43,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:43,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:43,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:43,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:43,962 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 170 [2019-01-31 17:38:43,963 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:44,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,225 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 178 [2019-01-31 17:38:44,226 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:44,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,447 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:38:44,448 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 150 [2019-01-31 17:38:44,449 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:44,630 INFO L267 ElimStorePlain]: Start of recursive call 1: 15 dim-0 vars, 3 dim-1 vars, End of recursive call: 15 dim-0 vars, and 3 xjuncts. [2019-01-31 17:38:44,630 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 18 variables, input treesize:357, output treesize:277 [2019-01-31 17:38:44,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:44,817 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 27 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 164 [2019-01-31 17:38:44,818 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:45,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:45,042 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 156 [2019-01-31 17:38:45,043 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:45,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:45,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:45,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:45,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:45,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:45,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:45,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:45,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:45,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:45,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:45,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:45,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:45,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:45,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:45,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:38:45,261 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:38:45,262 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 165 [2019-01-31 17:38:45,263 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-31 17:38:45,448 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2019-01-31 17:38:45,449 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:307, output treesize:237 [2019-01-31 17:38:45,707 WARN L181 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2019-01-31 17:38:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:45,709 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:38:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:38:45,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:38:45,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2019-01-31 17:38:45,757 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:38:45,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-31 17:38:45,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-31 17:38:45,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-01-31 17:38:45,757 INFO L87 Difference]: Start difference. First operand 125 states and 788 transitions. Second operand 10 states. [2019-01-31 17:38:47,602 WARN L181 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 120 [2019-01-31 17:39:04,602 WARN L181 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 147 [2019-01-31 17:39:05,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:39:05,799 INFO L93 Difference]: Finished difference Result 235 states and 1248 transitions. [2019-01-31 17:39:05,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-01-31 17:39:05,800 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-31 17:39:05,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:39:05,803 INFO L225 Difference]: With dead ends: 235 [2019-01-31 17:39:05,803 INFO L226 Difference]: Without dead ends: 230 [2019-01-31 17:39:05,804 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-01-31 17:39:05,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-01-31 17:39:05,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 145. [2019-01-31 17:39:05,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-01-31 17:39:05,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 973 transitions. [2019-01-31 17:39:05,843 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 973 transitions. Word has length 5 [2019-01-31 17:39:05,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:39:05,844 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 973 transitions. [2019-01-31 17:39:05,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-31 17:39:05,844 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 973 transitions. [2019-01-31 17:39:05,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-31 17:39:05,845 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:39:05,845 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-31 17:39:05,845 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:39:05,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:39:05,845 INFO L82 PathProgramCache]: Analyzing trace with hash 29589382, now seen corresponding path program 1 times [2019-01-31 17:39:05,845 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:39:05,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:39:05,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:39:05,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:39:05,846 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:39:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:39:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:39:05,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:39:05,994 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:39:05,994 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-31 17:39:05,994 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [36], [37] [2019-01-31 17:39:05,995 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:39:05,995 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:39:06,602 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:39:06,602 INFO L272 AbstractInterpreter]: Visited 5 different actions 11 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-31 17:39:06,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:39:06,603 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:39:06,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:39:06,603 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:39:06,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:39:06,611 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:39:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:39:06,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:39:06,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:06,646 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:39:06,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:06,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:06,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:39:06,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:06,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:06,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:06,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:06,765 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:39:06,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:06,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:06,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:06,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:06,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:06,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:06,834 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:39:06,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:06,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:06,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:06,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:06,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:06,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:06,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:06,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:06,918 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:39:07,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:07,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:07,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:07,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:07,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:07,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:07,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:07,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:07,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:07,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:07,037 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:39:07,038 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-31 17:39:07,082 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:39:07,126 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:39:07,170 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:39:07,214 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:39:07,259 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:39:07,313 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:39:07,317 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:39:07,320 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:39:07,324 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:39:07,328 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:39:07,331 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:39:07,336 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:39:07,348 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:39:07,349 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:39:07,406 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:39:07,449 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:39:07,484 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:39:07,509 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:39:07,531 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:39:07,550 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:39:07,567 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:39:07,639 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:39:07,640 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-31 17:39:07,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:07,885 INFO L303 Elim1Store]: Index analysis took 218 ms [2019-01-31 17:39:07,946 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2019-01-31 17:39:07,946 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-31 17:39:07,972 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-31 17:39:09,569 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2019-01-31 17:39:09,570 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:884 [2019-01-31 17:39:10,372 WARN L181 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 175 [2019-01-31 17:39:10,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:10,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:10,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:10,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:10,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:10,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:10,407 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:39:10,408 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 162 [2019-01-31 17:39:10,409 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:39:10,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:10,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:10,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:10,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:10,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:10,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:10,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:10,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:10,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:10,704 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 174 [2019-01-31 17:39:10,705 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-31 17:39:10,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:10,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:10,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:10,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:10,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:10,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:10,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:10,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:10,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:39:10,971 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 174 [2019-01-31 17:39:10,972 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-31 17:39:11,186 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2019-01-31 17:39:11,186 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:357, output treesize:277 [2019-01-31 17:39:25,947 WARN L181 SmtUtils]: Spent 13.82 s on a formula simplification that was a NOOP. DAG size: 158 [2019-01-31 17:39:25,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:39:25,953 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:39:25,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:39:25,991 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:39:25,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-31 17:39:25,991 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:39:25,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:39:25,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:39:25,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-01-31 17:39:25,992 INFO L87 Difference]: Start difference. First operand 145 states and 973 transitions. Second operand 8 states. [2019-01-31 17:41:07,858 WARN L181 SmtUtils]: Spent 1.08 m on a formula simplification. DAG size of input: 168 DAG size of output: 161 [2019-01-31 17:41:12,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:41:12,362 INFO L93 Difference]: Finished difference Result 254 states and 1519 transitions. [2019-01-31 17:41:12,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-31 17:41:12,362 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-31 17:41:12,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:41:12,365 INFO L225 Difference]: With dead ends: 254 [2019-01-31 17:41:12,365 INFO L226 Difference]: Without dead ends: 253 [2019-01-31 17:41:12,365 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 81.2s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-31 17:41:12,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2019-01-31 17:41:12,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 197. [2019-01-31 17:41:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2019-01-31 17:41:12,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 1447 transitions. [2019-01-31 17:41:12,422 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 1447 transitions. Word has length 5 [2019-01-31 17:41:12,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:41:12,422 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 1447 transitions. [2019-01-31 17:41:12,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:41:12,422 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 1447 transitions. [2019-01-31 17:41:12,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-31 17:41:12,423 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:41:12,423 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-31 17:41:12,423 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:41:12,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:41:12,423 INFO L82 PathProgramCache]: Analyzing trace with hash 29588574, now seen corresponding path program 1 times [2019-01-31 17:41:12,423 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:41:12,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:41:12,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:41:12,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:41:12,425 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:41:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:41:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:41:12,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:41:12,586 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:41:12,586 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-31 17:41:12,586 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [32], [35] [2019-01-31 17:41:12,588 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:41:12,588 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:41:13,440 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:41:13,440 INFO L272 AbstractInterpreter]: Visited 5 different actions 13 times. Merged at 2 different actions 2 times. Never widened. Found 9 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-31 17:41:13,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:41:13,440 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:41:13,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:41:13,441 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:41:13,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:41:13,450 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:41:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:41:13,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:41:13,493 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 27 treesize of output 30 [2019-01-31 17:41:13,496 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 30 treesize of output 36 [2019-01-31 17:41:13,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,502 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 32 treesize of output 46 [2019-01-31 17:41:13,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,510 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 34 treesize of output 60 [2019-01-31 17:41:13,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,518 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:41:13,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,532 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:41:13,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,545 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:41:13,561 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:41:13,562 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:41:13,623 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:41:13,673 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:41:13,712 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:41:13,742 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:41:13,768 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:41:13,787 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:41:13,806 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:41:13,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,854 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:41:13,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,904 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:41:13,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:13,958 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:41:14,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:14,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:14,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:14,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:14,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:14,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:14,025 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:41:14,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:14,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:14,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:14,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:14,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:14,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:14,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:14,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:14,110 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:41:14,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:14,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:14,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:14,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:14,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:14,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:14,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:14,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:14,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:14,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:14,217 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:41:14,217 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:41:14,257 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:41:14,298 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:41:14,338 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:41:14,381 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:41:14,424 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:41:14,499 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:41:14,500 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-31 17:41:14,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:14,621 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2019-01-31 17:41:14,622 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-31 17:41:14,648 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-31 17:41:16,252 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2019-01-31 17:41:16,253 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:884 [2019-01-31 17:41:17,174 WARN L181 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 179 [2019-01-31 17:41:17,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:17,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:17,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:17,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:17,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:17,254 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:41:17,255 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 162 [2019-01-31 17:41:17,256 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:41:17,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:17,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:17,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:17,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:17,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:17,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:17,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:17,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:17,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:17,517 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 174 [2019-01-31 17:41:17,519 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-31 17:41:17,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:17,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:17,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:17,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:17,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:17,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:17,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:17,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:17,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:17,796 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 178 [2019-01-31 17:41:17,797 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-31 17:41:18,024 INFO L267 ElimStorePlain]: Start of recursive call 1: 15 dim-0 vars, 3 dim-1 vars, End of recursive call: 15 dim-0 vars, and 3 xjuncts. [2019-01-31 17:41:18,024 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 18 variables, input treesize:365, output treesize:277 [2019-01-31 17:41:18,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,177 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 146 [2019-01-31 17:41:18,178 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:41:18,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,387 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:41:18,388 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 169 [2019-01-31 17:41:18,389 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-31 17:41:18,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:41:18,594 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 27 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 156 [2019-01-31 17:41:18,595 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-31 17:41:18,771 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2019-01-31 17:41:18,771 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:307, output treesize:237 [2019-01-31 17:41:19,112 WARN L181 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2019-01-31 17:41:19,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:41:19,114 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:41:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:41:19,169 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:41:19,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-31 17:41:19,169 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:41:19,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-31 17:41:19,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-31 17:41:19,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-01-31 17:41:19,170 INFO L87 Difference]: Start difference. First operand 197 states and 1447 transitions. Second operand 10 states. [2019-01-31 17:41:19,993 WARN L181 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 129 [2019-01-31 17:41:21,867 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:8092 -smt2 -in -t:10000) 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 [2019-01-31 17:41:21,871 INFO L168 Benchmark]: Toolchain (without parser) took 319189.52 ms. Allocated memory was 135.3 MB in the beginning and 520.1 MB in the end (delta: 384.8 MB). Free memory was 110.5 MB in the beginning and 193.5 MB in the end (delta: -83.0 MB). Peak memory consumption was 301.8 MB. Max. memory is 7.1 GB. [2019-01-31 17:41:21,872 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 135.3 MB. Free memory is still 111.4 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-31 17:41:21,872 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.28 ms. Allocated memory is still 135.3 MB. Free memory was 110.1 MB in the beginning and 107.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-01-31 17:41:21,872 INFO L168 Benchmark]: Boogie Preprocessor took 39.12 ms. Allocated memory is still 135.3 MB. Free memory was 107.9 MB in the beginning and 106.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-01-31 17:41:21,872 INFO L168 Benchmark]: RCFGBuilder took 567.21 ms. Allocated memory is still 135.3 MB. Free memory was 106.7 MB in the beginning and 93.3 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2019-01-31 17:41:21,872 INFO L168 Benchmark]: TraceAbstraction took 318508.82 ms. Allocated memory was 135.3 MB in the beginning and 520.1 MB in the end (delta: 384.8 MB). Free memory was 93.3 MB in the beginning and 193.5 MB in the end (delta: -100.2 MB). Peak memory consumption was 284.6 MB. Max. memory is 7.1 GB. [2019-01-31 17:41:21,874 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 135.3 MB. Free memory is still 111.4 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 69.28 ms. Allocated memory is still 135.3 MB. Free memory was 110.1 MB in the beginning and 107.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 39.12 ms. Allocated memory is still 135.3 MB. Free memory was 107.9 MB in the beginning and 106.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 567.21 ms. Allocated memory is still 135.3 MB. Free memory was 106.7 MB in the beginning and 93.3 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 318508.82 ms. Allocated memory was 135.3 MB in the beginning and 520.1 MB in the end (delta: 384.8 MB). Free memory was 93.3 MB in the beginning and 193.5 MB in the end (delta: -100.2 MB). Peak memory consumption was 284.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in -t:10000) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in -t:10000) 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...