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 0.1.24-1de736e-m [2019-02-18 10:08:44,306 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-02-18 10:08:44,308 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-02-18 10:08:44,329 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-02-18 10:08:44,390 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 [2019-02-18 10:08:44,417 INFO L110 SettingsManager]: Loading preferences was successful [2019-02-18 10:08:44,418 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-02-18 10:08:44,421 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-02-18 10:08:44,421 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-02-18 10:08:44,421 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-02-18 10:08:44,421 INFO L133 SettingsManager]: * User list type=DISABLED [2019-02-18 10:08:44,421 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-02-18 10:08:44,422 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-02-18 10:08:44,422 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-02-18 10:08:44,422 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-02-18 10:08:44,422 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-02-18 10:08:44,422 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-02-18 10:08:44,422 INFO L133 SettingsManager]: * Interval Domain=false [2019-02-18 10:08:44,423 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-02-18 10:08:44,423 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-02-18 10:08:44,423 INFO L133 SettingsManager]: * Use SBE=true [2019-02-18 10:08:44,424 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-02-18 10:08:44,424 INFO L133 SettingsManager]: * sizeof long=4 [2019-02-18 10:08:44,425 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-02-18 10:08:44,425 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-02-18 10:08:44,425 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-02-18 10:08:44,425 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-02-18 10:08:44,426 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-02-18 10:08:44,426 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-02-18 10:08:44,426 INFO L133 SettingsManager]: * sizeof long double=12 [2019-02-18 10:08:44,426 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-02-18 10:08:44,426 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-02-18 10:08:44,426 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-02-18 10:08:44,427 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-02-18 10:08:44,427 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-02-18 10:08:44,427 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in -t:10000 [2019-02-18 10:08:44,427 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-02-18 10:08:44,427 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-02-18 10:08:44,428 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-02-18 10:08:44,428 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-02-18 10:08:44,428 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-02-18 10:08:44,428 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in [2019-02-18 10:08:44,429 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-02-18 10:08:44,429 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-02-18 10:08:44,481 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-02-18 10:08:44,495 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-02-18 10:08:44,500 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-02-18 10:08:44,502 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-02-18 10:08:44,503 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-02-18 10:08:44,503 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl [2019-02-18 10:08:44,504 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl' [2019-02-18 10:08:44,561 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-02-18 10:08:44,562 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-02-18 10:08:44,563 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-02-18 10:08:44,563 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-02-18 10:08:44,563 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-02-18 10:08:44,582 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 18.02 10:08:44" (1/1) ... [2019-02-18 10:08:44,596 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 18.02 10:08:44" (1/1) ... [2019-02-18 10:08:44,622 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-02-18 10:08:44,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-02-18 10:08:44,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-02-18 10:08:44,623 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-02-18 10:08:44,634 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 18.02 10:08:44" (1/1) ... [2019-02-18 10:08:44,634 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 18.02 10:08:44" (1/1) ... [2019-02-18 10:08:44,637 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 18.02 10:08:44" (1/1) ... [2019-02-18 10:08:44,637 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 18.02 10:08:44" (1/1) ... [2019-02-18 10:08:44,641 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 18.02 10:08:44" (1/1) ... [2019-02-18 10:08:44,646 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 18.02 10:08:44" (1/1) ... [2019-02-18 10:08:44,647 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 18.02 10:08:44" (1/1) ... [2019-02-18 10:08:44,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-02-18 10:08:44,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-02-18 10:08:44,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-02-18 10:08:44,660 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-02-18 10:08:44,661 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 18.02 10:08:44" (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 [2019-02-18 10:08:44,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-02-18 10:08:44,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-02-18 10:08:45,313 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-02-18 10:08:45,313 INFO L286 CfgBuilder]: Removed 19 assue(true) statements. [2019-02-18 10:08:45,315 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 10:08:45 BoogieIcfgContainer [2019-02-18 10:08:45,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-02-18 10:08:45,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-02-18 10:08:45,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-02-18 10:08:45,319 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-02-18 10:08:45,320 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 18.02 10:08:44" (1/2) ... [2019-02-18 10:08:45,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14366b3e and model type speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 10:08:45, skipping insertion in model container [2019-02-18 10:08:45,321 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 18.02 10:08:45" (2/2) ... [2019-02-18 10:08:45,323 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-8-unlimited.bpl [2019-02-18 10:08:45,334 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-02-18 10:08:45,341 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-02-18 10:08:45,361 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-02-18 10:08:45,393 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-02-18 10:08:45,394 INFO L383 AbstractCegarLoop]: Hoare is true [2019-02-18 10:08:45,394 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-02-18 10:08:45,394 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-02-18 10:08:45,394 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-02-18 10:08:45,395 INFO L387 AbstractCegarLoop]: Difference is false [2019-02-18 10:08:45,395 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-02-18 10:08:45,395 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-02-18 10:08:45,432 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-02-18 10:08:45,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-02-18 10:08:45,441 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:08:45,442 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-02-18 10:08:45,445 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:08:45,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:45,451 INFO L82 PathProgramCache]: Analyzing trace with hash 996, now seen corresponding path program 1 times [2019-02-18 10:08:45,454 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:08:45,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:45,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:45,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:45,499 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:08:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:45,666 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-18 10:08:45,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-02-18 10:08:45,666 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-18 10:08:45,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-02-18 10:08:45,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-02-18 10:08:45,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-18 10:08:45,685 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-02-18 10:08:45,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:08:45,933 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2019-02-18 10:08:45,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-18 10:08:45,936 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-02-18 10:08:45,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:08:45,959 INFO L225 Difference]: With dead ends: 37 [2019-02-18 10:08:45,959 INFO L226 Difference]: Without dead ends: 32 [2019-02-18 10:08:45,966 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 [2019-02-18 10:08:45,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-02-18 10:08:46,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 18. [2019-02-18 10:08:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-02-18 10:08:46,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 33 transitions. [2019-02-18 10:08:46,005 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 33 transitions. Word has length 2 [2019-02-18 10:08:46,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:08:46,007 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 33 transitions. [2019-02-18 10:08:46,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-02-18 10:08:46,007 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 33 transitions. [2019-02-18 10:08:46,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 10:08:46,008 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:08:46,008 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 10:08:46,009 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:08:46,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:46,021 INFO L82 PathProgramCache]: Analyzing trace with hash 30818, now seen corresponding path program 1 times [2019-02-18 10:08:46,021 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:08:46,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:46,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:46,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:46,023 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:08:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:46,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:46,256 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:08:46,257 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-18 10:08:46,262 INFO L207 CegarAbsIntRunner]: [0], [32], [35] [2019-02-18 10:08:46,326 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:08:46,326 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:08:50,340 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:08:50,342 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. [2019-02-18 10:08:50,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:50,349 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:08:50,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:50,349 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 [2019-02-18 10:08:50,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:50,363 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:08:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:50,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:08:50,700 WARN L181 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-02-18 10:08:50,736 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 [2019-02-18 10:08:50,761 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 [2019-02-18 10:08:50,806 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:50,830 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:50,833 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 [2019-02-18 10:08:50,870 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:50,893 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:50,921 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:50,923 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 [2019-02-18 10:08:50,976 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:51,002 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:51,019 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:51,043 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:51,044 INFO L303 Elim1Store]: Index analysis took 111 ms [2019-02-18 10:08:51,045 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 [2019-02-18 10:08:51,092 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:51,111 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:51,128 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:51,141 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:51,160 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:51,160 INFO L303 Elim1Store]: Index analysis took 106 ms [2019-02-18 10:08:51,162 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-18 10:08:51,212 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:51,224 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:51,247 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:51,257 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:51,280 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:51,303 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:51,304 INFO L303 Elim1Store]: Index analysis took 135 ms [2019-02-18 10:08:51,307 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 [2019-02-18 10:08:51,359 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:51,381 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:51,403 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:51,424 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:51,449 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:51,474 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:51,496 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:51,497 INFO L303 Elim1Store]: Index analysis took 180 ms [2019-02-18 10:08:51,498 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 [2019-02-18 10:08:51,501 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:51,966 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:52,368 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:52,419 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:52,499 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:52,532 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:52,555 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:52,577 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:52,648 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:52,650 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 [2019-02-18 10:08:52,718 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:52,719 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:52,720 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 [2019-02-18 10:08:52,814 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:52,815 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:52,816 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:52,851 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:52,852 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-18 10:08:53,107 WARN L181 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-02-18 10:08:53,114 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,120 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,146 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,155 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,156 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,157 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,158 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 [2019-02-18 10:08:53,262 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,262 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,263 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,264 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,265 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,266 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,267 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,269 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,272 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 [2019-02-18 10:08:53,433 WARN L181 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-02-18 10:08:53,440 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,441 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,442 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,444 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,446 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,448 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,449 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,450 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,452 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,453 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,455 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 [2019-02-18 10:08:53,595 WARN L181 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-18 10:08:53,611 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,616 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,617 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,618 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,619 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,620 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,621 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,622 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,623 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,625 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,626 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,627 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:53,629 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 [2019-02-18 10:08:53,631 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:53,692 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:53,751 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:53,824 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:53,886 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:53,946 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:54,074 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:54,194 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. [2019-02-18 10:08:54,195 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:147, output treesize:153 [2019-02-18 10:08:54,301 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:54,303 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 51 treesize of output 159 [2019-02-18 10:08:54,304 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:54,489 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. [2019-02-18 10:08:54,489 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-02-18 10:08:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:54,518 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:08:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:54,597 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:08:54,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 10:08:54,597 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:08:54,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 10:08:54,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 10:08:54,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 10:08:54,599 INFO L87 Difference]: Start difference. First operand 18 states and 33 transitions. Second operand 6 states. [2019-02-18 10:09:05,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:09:05,935 INFO L93 Difference]: Finished difference Result 63 states and 92 transitions. [2019-02-18 10:09:05,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 10:09:05,935 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-18 10:09:05,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:09:05,937 INFO L225 Difference]: With dead ends: 63 [2019-02-18 10:09:05,937 INFO L226 Difference]: Without dead ends: 60 [2019-02-18 10:09:05,938 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 [2019-02-18 10:09:05,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-02-18 10:09:05,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 25. [2019-02-18 10:09:05,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-02-18 10:09:05,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 53 transitions. [2019-02-18 10:09:05,946 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 53 transitions. Word has length 3 [2019-02-18 10:09:05,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:09:05,946 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 53 transitions. [2019-02-18 10:09:05,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 10:09:05,946 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 53 transitions. [2019-02-18 10:09:05,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 10:09:05,947 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:09:05,947 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 10:09:05,947 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:09:05,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:05,948 INFO L82 PathProgramCache]: Analyzing trace with hash 30384, now seen corresponding path program 1 times [2019-02-18 10:09:05,948 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:09:05,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:05,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:05,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:05,949 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:09:05,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:06,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:06,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:06,056 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:09:06,056 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-18 10:09:06,056 INFO L207 CegarAbsIntRunner]: [0], [18], [35] [2019-02-18 10:09:06,058 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:09:06,058 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:09:06,395 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:09:06,396 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. [2019-02-18 10:09:06,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:06,396 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:09:06,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:06,396 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-02-18 10:09:06,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:06,414 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:09:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:06,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:09:06,558 WARN L181 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-02-18 10:09:06,561 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 [2019-02-18 10:09:06,568 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 [2019-02-18 10:09:06,573 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:06,574 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:06,575 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 [2019-02-18 10:09:06,579 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:06,584 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:06,585 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:06,586 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 [2019-02-18 10:09:06,593 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:06,595 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:06,596 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:06,598 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:06,600 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 [2019-02-18 10:09:06,610 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:06,611 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:06,613 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:06,615 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:06,616 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:06,618 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-18 10:09:06,628 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:06,630 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:06,632 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:06,633 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:06,634 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:06,634 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:06,636 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 [2019-02-18 10:09:06,652 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 [2019-02-18 10:09:06,654 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:06,728 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:06,774 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:06,806 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:06,836 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:06,860 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:06,881 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:06,909 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:06,952 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:06,953 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 [2019-02-18 10:09:07,000 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,005 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,006 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 [2019-02-18 10:09:07,094 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,095 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,096 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,098 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,099 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 [2019-02-18 10:09:07,154 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,155 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,156 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,157 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,158 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,160 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,161 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 [2019-02-18 10:09:07,236 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,237 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,239 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,240 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,241 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,242 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,242 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,244 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,245 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-18 10:09:07,352 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,353 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,354 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,355 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,356 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,357 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,359 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,360 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,363 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,364 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,365 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 [2019-02-18 10:09:07,366 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:07,404 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:07,443 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:07,482 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:07,527 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:07,565 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:07,636 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. [2019-02-18 10:09:07,636 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-02-18 10:09:07,702 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:07,703 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 [2019-02-18 10:09:07,704 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:07,777 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 10:09:07,778 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-02-18 10:09:07,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:07,799 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:09:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:07,827 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:09:07,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 10:09:07,828 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:09:07,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 10:09:07,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 10:09:07,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 10:09:07,829 INFO L87 Difference]: Start difference. First operand 25 states and 53 transitions. Second operand 6 states. [2019-02-18 10:09:08,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:09:08,772 INFO L93 Difference]: Finished difference Result 62 states and 99 transitions. [2019-02-18 10:09:08,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 10:09:08,773 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-18 10:09:08,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:09:08,775 INFO L225 Difference]: With dead ends: 62 [2019-02-18 10:09:08,775 INFO L226 Difference]: Without dead ends: 60 [2019-02-18 10:09:08,777 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 [2019-02-18 10:09:08,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-02-18 10:09:08,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 26. [2019-02-18 10:09:08,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-02-18 10:09:08,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 61 transitions. [2019-02-18 10:09:08,784 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 61 transitions. Word has length 3 [2019-02-18 10:09:08,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:09:08,784 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 61 transitions. [2019-02-18 10:09:08,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 10:09:08,784 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 61 transitions. [2019-02-18 10:09:08,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 10:09:08,785 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:09:08,785 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 10:09:08,785 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:09:08,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:08,786 INFO L82 PathProgramCache]: Analyzing trace with hash 30944, now seen corresponding path program 1 times [2019-02-18 10:09:08,786 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:09:08,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:08,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:08,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:08,787 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:09:08,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:08,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:08,871 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-18 10:09:08,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-02-18 10:09:08,871 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-18 10:09:08,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-02-18 10:09:08,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-02-18 10:09:08,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-18 10:09:08,872 INFO L87 Difference]: Start difference. First operand 26 states and 61 transitions. Second operand 3 states. [2019-02-18 10:09:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:09:08,952 INFO L93 Difference]: Finished difference Result 31 states and 61 transitions. [2019-02-18 10:09:08,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-18 10:09:08,952 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-02-18 10:09:08,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:09:08,953 INFO L225 Difference]: With dead ends: 31 [2019-02-18 10:09:08,954 INFO L226 Difference]: Without dead ends: 30 [2019-02-18 10:09:08,954 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 [2019-02-18 10:09:08,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-02-18 10:09:08,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-02-18 10:09:08,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-02-18 10:09:08,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 60 transitions. [2019-02-18 10:09:08,962 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 60 transitions. Word has length 3 [2019-02-18 10:09:08,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:09:08,963 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 60 transitions. [2019-02-18 10:09:08,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-02-18 10:09:08,963 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 60 transitions. [2019-02-18 10:09:08,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 10:09:08,963 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:09:08,963 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 10:09:08,964 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:09:08,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:08,964 INFO L82 PathProgramCache]: Analyzing trace with hash 30012, now seen corresponding path program 1 times [2019-02-18 10:09:08,964 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:09:08,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:08,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:08,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:08,966 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:09:08,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:09,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:09,023 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:09:09,024 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-18 10:09:09,024 INFO L207 CegarAbsIntRunner]: [0], [6], [35] [2019-02-18 10:09:09,027 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:09:09,027 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:09:09,394 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:09:09,395 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 10:09:09,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:09,395 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:09:09,395 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:09,395 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 [2019-02-18 10:09:09,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:09,411 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:09:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:09,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:09:09,561 WARN L181 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-02-18 10:09:09,564 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:09,565 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-18 10:09:09,612 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:09,613 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:09,615 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 [2019-02-18 10:09:09,674 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:09,676 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:09,678 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:09,680 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:09,681 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 [2019-02-18 10:09:09,764 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:09,766 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:09,768 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:09,769 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:09,770 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:09,772 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:09,773 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-18 10:09:09,868 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:09,870 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:09,872 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:09,875 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:09,877 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:09,880 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:09,883 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:09,885 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:09,886 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 [2019-02-18 10:09:10,016 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:10,040 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:10,041 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:10,042 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:10,042 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:10,043 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:10,044 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:10,045 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:10,046 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:10,047 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:10,050 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 [2019-02-18 10:09:10,051 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:10,094 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:10,136 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:10,197 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:10,266 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:10,307 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:10,368 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 [2019-02-18 10:09:10,373 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 [2019-02-18 10:09:10,379 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 [2019-02-18 10:09:10,383 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 [2019-02-18 10:09:10,387 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 [2019-02-18 10:09:10,392 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 [2019-02-18 10:09:10,413 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 [2019-02-18 10:09:10,582 INFO L303 Elim1Store]: Index analysis took 166 ms [2019-02-18 10:09:10,583 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 [2019-02-18 10:09:10,584 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:10,727 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:10,768 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:10,801 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:10,860 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:10,971 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:10,990 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:11,004 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:11,077 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. [2019-02-18 10:09:11,077 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 9 variables, input treesize:121, output treesize:125 [2019-02-18 10:09:11,106 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:11,107 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 [2019-02-18 10:09:11,108 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:11,174 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. [2019-02-18 10:09:11,175 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-02-18 10:09:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:11,200 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:09:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:11,223 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-02-18 10:09:11,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-02-18 10:09:11,224 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-18 10:09:11,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-02-18 10:09:11,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-02-18 10:09:11,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-02-18 10:09:11,225 INFO L87 Difference]: Start difference. First operand 26 states and 60 transitions. Second operand 4 states. [2019-02-18 10:09:11,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:09:11,324 INFO L93 Difference]: Finished difference Result 32 states and 98 transitions. [2019-02-18 10:09:11,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-02-18 10:09:11,324 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-02-18 10:09:11,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:09:11,326 INFO L225 Difference]: With dead ends: 32 [2019-02-18 10:09:11,326 INFO L226 Difference]: Without dead ends: 31 [2019-02-18 10:09:11,327 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-02-18 10:09:11,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-02-18 10:09:11,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-02-18 10:09:11,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-02-18 10:09:11,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 97 transitions. [2019-02-18 10:09:11,335 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 97 transitions. Word has length 3 [2019-02-18 10:09:11,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:09:11,335 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 97 transitions. [2019-02-18 10:09:11,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-02-18 10:09:11,335 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 97 transitions. [2019-02-18 10:09:11,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 10:09:11,336 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:09:11,336 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 10:09:11,336 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:09:11,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:11,337 INFO L82 PathProgramCache]: Analyzing trace with hash 30136, now seen corresponding path program 1 times [2019-02-18 10:09:11,337 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:09:11,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:11,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:11,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:11,338 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:09:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:11,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:11,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:11,459 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:09:11,459 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-18 10:09:11,460 INFO L207 CegarAbsIntRunner]: [0], [10], [35] [2019-02-18 10:09:11,461 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:09:11,461 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:09:11,779 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:09:11,779 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. [2019-02-18 10:09:11,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:11,780 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:09:11,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:11,780 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 [2019-02-18 10:09:11,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:11,793 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:09:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:11,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:09:11,872 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 [2019-02-18 10:09:11,875 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 [2019-02-18 10:09:11,879 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:11,881 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:11,882 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 [2019-02-18 10:09:11,887 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:11,888 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:11,889 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:11,890 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 [2019-02-18 10:09:11,896 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:11,898 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:11,900 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:11,902 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:11,904 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 [2019-02-18 10:09:11,917 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:11,919 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:11,925 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:11,927 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:11,929 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:11,930 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 10:09:11,937 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:11,939 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:11,940 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:11,940 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:11,941 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:11,942 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:11,943 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 [2019-02-18 10:09:12,030 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 [2019-02-18 10:09:12,032 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:12,090 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:12,136 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:12,171 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:12,199 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:12,224 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:12,243 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:12,261 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:12,338 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,339 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 [2019-02-18 10:09:12,399 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,400 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,401 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 [2019-02-18 10:09:12,459 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,461 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,462 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,463 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,464 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 [2019-02-18 10:09:12,533 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,534 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,535 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,567 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,590 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,597 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,598 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 [2019-02-18 10:09:12,669 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,680 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,681 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,682 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,683 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,683 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,684 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,688 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,689 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 [2019-02-18 10:09:12,839 WARN L181 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-02-18 10:09:12,844 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,845 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,846 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,846 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,847 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,848 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,849 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,850 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,851 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,854 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:12,855 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 [2019-02-18 10:09:12,856 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:12,893 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:12,931 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:12,973 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:13,011 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:13,050 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:13,122 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. [2019-02-18 10:09:13,123 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-02-18 10:09:13,183 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:13,184 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 [2019-02-18 10:09:13,184 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:13,257 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. [2019-02-18 10:09:13,258 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-02-18 10:09:13,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:13,276 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:09:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:13,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:09:13,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 10:09:13,307 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:09:13,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 10:09:13,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 10:09:13,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 10:09:13,308 INFO L87 Difference]: Start difference. First operand 30 states and 97 transitions. Second operand 6 states. [2019-02-18 10:09:14,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:09:14,228 INFO L93 Difference]: Finished difference Result 65 states and 143 transitions. [2019-02-18 10:09:14,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 10:09:14,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-18 10:09:14,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:09:14,230 INFO L225 Difference]: With dead ends: 65 [2019-02-18 10:09:14,230 INFO L226 Difference]: Without dead ends: 64 [2019-02-18 10:09:14,231 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 [2019-02-18 10:09:14,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-02-18 10:09:14,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2019-02-18 10:09:14,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-02-18 10:09:14,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 115 transitions. [2019-02-18 10:09:14,240 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 115 transitions. Word has length 3 [2019-02-18 10:09:14,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:09:14,241 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 115 transitions. [2019-02-18 10:09:14,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 10:09:14,241 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 115 transitions. [2019-02-18 10:09:14,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 10:09:14,241 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:09:14,242 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 10:09:14,242 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:09:14,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:14,242 INFO L82 PathProgramCache]: Analyzing trace with hash 30632, now seen corresponding path program 1 times [2019-02-18 10:09:14,242 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:09:14,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:14,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:14,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:14,243 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:09:14,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:14,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:14,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:14,379 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:09:14,379 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-18 10:09:14,379 INFO L207 CegarAbsIntRunner]: [0], [26], [35] [2019-02-18 10:09:14,381 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:09:14,381 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:09:14,647 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:09:14,647 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. [2019-02-18 10:09:14,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:14,647 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:09:14,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:14,648 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 [2019-02-18 10:09:14,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:14,661 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:09:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:14,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:09:14,703 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 [2019-02-18 10:09:14,707 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 [2019-02-18 10:09:14,713 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:14,716 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:14,717 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 [2019-02-18 10:09:14,724 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:14,726 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:14,729 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:14,730 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 [2019-02-18 10:09:14,738 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:14,740 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:14,742 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:14,744 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:14,745 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 [2019-02-18 10:09:14,750 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:14,752 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:14,754 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:14,756 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:14,758 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:14,759 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 [2019-02-18 10:09:14,764 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:14,766 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:14,768 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:14,770 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:14,772 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:14,774 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:14,776 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-18 10:09:14,849 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 [2019-02-18 10:09:14,849 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:14,929 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:14,983 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:15,024 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:15,053 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:15,077 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:15,094 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:15,112 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:15,162 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,163 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 [2019-02-18 10:09:15,203 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,204 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,205 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 [2019-02-18 10:09:15,254 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,255 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,255 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,256 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,257 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 [2019-02-18 10:09:15,320 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,321 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,322 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,323 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,325 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,326 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,327 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 [2019-02-18 10:09:15,396 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,398 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,399 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,400 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,401 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,402 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,403 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,404 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,406 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 [2019-02-18 10:09:15,498 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,499 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,500 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,501 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,502 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,503 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,505 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,506 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,507 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,508 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,509 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 [2019-02-18 10:09:15,510 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:15,559 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:15,598 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:15,637 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:15,678 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:15,719 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:15,790 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. [2019-02-18 10:09:15,791 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-02-18 10:09:15,848 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:15,849 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 [2019-02-18 10:09:15,850 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:15,920 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. [2019-02-18 10:09:15,920 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-02-18 10:09:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:15,938 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:09:15,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:15,967 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:09:15,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 10:09:15,967 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:09:15,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 10:09:15,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 10:09:15,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 10:09:15,968 INFO L87 Difference]: Start difference. First operand 32 states and 115 transitions. Second operand 6 states. [2019-02-18 10:09:16,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:09:16,707 INFO L93 Difference]: Finished difference Result 67 states and 161 transitions. [2019-02-18 10:09:16,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 10:09:16,708 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-18 10:09:16,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:09:16,709 INFO L225 Difference]: With dead ends: 67 [2019-02-18 10:09:16,709 INFO L226 Difference]: Without dead ends: 65 [2019-02-18 10:09:16,710 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 [2019-02-18 10:09:16,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-02-18 10:09:16,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2019-02-18 10:09:16,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-02-18 10:09:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 132 transitions. [2019-02-18 10:09:16,720 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 132 transitions. Word has length 3 [2019-02-18 10:09:16,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:09:16,720 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 132 transitions. [2019-02-18 10:09:16,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 10:09:16,721 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 132 transitions. [2019-02-18 10:09:16,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:09:16,721 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:09:16,722 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:09:16,722 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:09:16,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:16,722 INFO L82 PathProgramCache]: Analyzing trace with hash 954866, now seen corresponding path program 1 times [2019-02-18 10:09:16,722 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:09:16,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:16,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:16,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:16,724 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:09:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:16,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:16,817 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:09:16,817 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:09:16,818 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [35] [2019-02-18 10:09:16,819 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:09:16,819 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:09:17,624 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:09:17,624 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. [2019-02-18 10:09:17,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:17,625 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:09:17,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:17,625 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 [2019-02-18 10:09:17,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:17,633 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:09:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:17,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:09:17,679 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 [2019-02-18 10:09:17,686 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 [2019-02-18 10:09:17,692 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,694 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,695 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 [2019-02-18 10:09:17,700 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,702 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,704 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,705 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-02-18 10:09:17,709 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,711 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,713 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,715 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,716 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 [2019-02-18 10:09:17,725 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,727 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,729 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,732 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,733 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,734 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 [2019-02-18 10:09:17,779 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,796 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,816 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,820 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,822 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,823 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,824 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 [2019-02-18 10:09:17,855 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,878 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,904 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,925 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,929 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,933 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,935 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,935 INFO L303 Elim1Store]: Index analysis took 109 ms [2019-02-18 10:09:17,936 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 [2019-02-18 10:09:17,937 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:18,190 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:18,288 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:18,325 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:18,352 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:18,376 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:18,395 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:18,412 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:18,462 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,463 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 [2019-02-18 10:09:18,541 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,542 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,544 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 [2019-02-18 10:09:18,640 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,641 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,642 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,644 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,645 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 [2019-02-18 10:09:18,715 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,716 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,717 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,719 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,721 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,721 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,722 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 [2019-02-18 10:09:18,859 WARN L181 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-02-18 10:09:18,863 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,864 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,865 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,865 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,866 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,868 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,869 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,870 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,871 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-18 10:09:18,970 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,972 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,973 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,974 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,975 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,976 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,977 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,978 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,979 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,981 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,982 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 [2019-02-18 10:09:19,105 WARN L181 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-18 10:09:19,110 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:19,111 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:19,112 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:19,113 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:19,114 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:19,115 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:19,116 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:19,117 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:19,118 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:19,120 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:19,121 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:19,122 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:19,123 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 [2019-02-18 10:09:19,124 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:19,181 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:19,238 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:19,295 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:19,354 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:19,412 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:19,472 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:19,578 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. [2019-02-18 10:09:19,579 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-02-18 10:09:19,634 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:19,635 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 [2019-02-18 10:09:19,636 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:19,730 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. [2019-02-18 10:09:19,730 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-02-18 10:09:19,817 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:19,819 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:19,821 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:19,823 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:19,825 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:19,827 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:19,829 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:19,831 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:19,833 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:19,833 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:09:19,834 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 [2019-02-18 10:09:19,835 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:19,961 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. [2019-02-18 10:09:19,962 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-02-18 10:09:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:20,035 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:09:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:20,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:09:20,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:09:20,091 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:09:20,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:09:20,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:09:20,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:09:20,092 INFO L87 Difference]: Start difference. First operand 34 states and 132 transitions. Second operand 8 states. [2019-02-18 10:09:24,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:09:24,476 INFO L93 Difference]: Finished difference Result 82 states and 191 transitions. [2019-02-18 10:09:24,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:09:24,477 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 10:09:24,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:09:24,478 INFO L225 Difference]: With dead ends: 82 [2019-02-18 10:09:24,479 INFO L226 Difference]: Without dead ends: 80 [2019-02-18 10:09:24,479 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 [2019-02-18 10:09:24,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-02-18 10:09:24,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 36. [2019-02-18 10:09:24,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-02-18 10:09:24,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 128 transitions. [2019-02-18 10:09:24,489 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 128 transitions. Word has length 4 [2019-02-18 10:09:24,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:09:24,489 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 128 transitions. [2019-02-18 10:09:24,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:09:24,489 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 128 transitions. [2019-02-18 10:09:24,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:09:24,490 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:09:24,490 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:09:24,490 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:09:24,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:24,491 INFO L82 PathProgramCache]: Analyzing trace with hash 955426, now seen corresponding path program 1 times [2019-02-18 10:09:24,491 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:09:24,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:24,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:24,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:24,492 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:09:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:24,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:24,578 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:09:24,578 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:09:24,578 INFO L207 CegarAbsIntRunner]: [0], [32], [36], [37] [2019-02-18 10:09:24,579 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:09:24,580 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:09:26,484 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:09:26,484 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. [2019-02-18 10:09:26,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:26,484 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:09:26,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:26,484 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 [2019-02-18 10:09:26,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:26,493 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:09:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:26,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:09:26,516 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 [2019-02-18 10:09:26,543 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,550 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,551 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 [2019-02-18 10:09:26,608 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,611 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,616 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,619 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,620 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 [2019-02-18 10:09:26,675 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,678 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,680 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,682 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,685 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,690 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,692 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 [2019-02-18 10:09:26,761 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,764 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,766 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,768 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,770 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,773 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,775 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,782 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,783 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-18 10:09:26,872 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,874 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,876 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,878 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,879 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,881 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,883 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,885 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,886 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,890 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:26,891 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 [2019-02-18 10:09:26,892 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:26,946 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:27,004 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:27,063 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:27,124 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:27,185 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:27,313 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2019-02-18 10:09:27,317 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-02-18 10:09:27,361 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 [2019-02-18 10:09:27,394 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-02-18 10:09:27,433 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 [2019-02-18 10:09:27,438 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-18 10:09:27,446 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 [2019-02-18 10:09:27,463 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 [2019-02-18 10:09:27,464 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:27,516 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:27,556 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:27,587 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:27,611 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:27,631 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:27,646 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:27,661 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:27,729 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. [2019-02-18 10:09:27,730 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-02-18 10:09:28,412 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:28,471 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 [2019-02-18 10:09:28,472 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-02-18 10:09:28,528 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-02-18 10:09:30,393 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. [2019-02-18 10:09:30,393 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:131, output treesize:861 [2019-02-18 10:09:37,765 WARN L181 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 474 DAG size of output: 98 [2019-02-18 10:09:37,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:37,772 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:09:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:37,796 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-02-18 10:09:37,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-02-18 10:09:37,797 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-18 10:09:37,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-02-18 10:09:37,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-02-18 10:09:37,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-02-18 10:09:37,797 INFO L87 Difference]: Start difference. First operand 36 states and 128 transitions. Second operand 4 states. [2019-02-18 10:09:37,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:09:37,855 INFO L93 Difference]: Finished difference Result 40 states and 140 transitions. [2019-02-18 10:09:37,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-18 10:09:37,856 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-02-18 10:09:37,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:09:37,857 INFO L225 Difference]: With dead ends: 40 [2019-02-18 10:09:37,857 INFO L226 Difference]: Without dead ends: 39 [2019-02-18 10:09:37,857 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-02-18 10:09:37,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-02-18 10:09:37,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-02-18 10:09:37,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-02-18 10:09:37,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 138 transitions. [2019-02-18 10:09:37,865 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 138 transitions. Word has length 4 [2019-02-18 10:09:37,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:09:37,866 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 138 transitions. [2019-02-18 10:09:37,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-02-18 10:09:37,866 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 138 transitions. [2019-02-18 10:09:37,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:09:37,867 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:09:37,867 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:09:37,867 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:09:37,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:37,867 INFO L82 PathProgramCache]: Analyzing trace with hash 954990, now seen corresponding path program 1 times [2019-02-18 10:09:37,867 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:09:37,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:37,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:37,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:37,869 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:09:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:38,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:38,096 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:09:38,096 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:09:38,096 INFO L207 CegarAbsIntRunner]: [0], [22], [32], [35] [2019-02-18 10:09:38,097 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:09:38,097 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:09:38,736 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:09:38,736 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. [2019-02-18 10:09:38,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:38,737 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:09:38,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:38,737 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 [2019-02-18 10:09:38,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:38,746 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:09:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:38,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:09:38,798 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:38,798 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 [2019-02-18 10:09:38,854 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:38,856 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:38,856 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 [2019-02-18 10:09:38,915 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:38,918 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:38,920 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:38,923 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:38,924 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 [2019-02-18 10:09:38,995 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:38,998 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,001 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,004 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,006 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,009 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,010 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 [2019-02-18 10:09:39,093 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,095 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,098 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,101 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,103 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,106 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,109 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,112 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,113 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 [2019-02-18 10:09:39,219 WARN L181 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-02-18 10:09:39,227 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,229 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,231 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,233 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,236 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,238 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,239 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,254 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,256 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,260 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,261 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 [2019-02-18 10:09:39,414 WARN L181 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-18 10:09:39,420 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,421 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,422 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,424 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,425 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,427 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,429 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,430 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,432 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,434 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,437 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,438 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:39,442 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 [2019-02-18 10:09:39,442 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:39,516 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:39,586 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:39,659 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:39,737 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:39,815 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:39,894 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:39,984 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2019-02-18 10:09:39,988 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-02-18 10:09:39,990 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 [2019-02-18 10:09:39,993 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 [2019-02-18 10:09:40,000 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 [2019-02-18 10:09:40,004 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 [2019-02-18 10:09:40,017 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-18 10:09:40,026 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 [2019-02-18 10:09:40,027 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:40,097 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:40,138 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:40,173 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:40,196 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:40,218 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:40,236 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:40,253 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:40,374 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. [2019-02-18 10:09:40,374 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-02-18 10:09:40,419 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:40,420 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 [2019-02-18 10:09:40,421 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:40,517 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. [2019-02-18 10:09:40,517 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-02-18 10:09:40,549 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:40,550 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:40,551 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:40,552 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:40,553 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:40,554 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:40,555 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:40,556 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:40,557 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:40,558 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:40,560 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 [2019-02-18 10:09:40,561 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:40,683 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. [2019-02-18 10:09:40,684 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-02-18 10:09:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:40,765 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:09:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:40,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:09:40,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:09:40,818 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:09:40,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:09:40,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:09:40,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:09:40,819 INFO L87 Difference]: Start difference. First operand 38 states and 138 transitions. Second operand 8 states. [2019-02-18 10:09:44,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:09:44,690 INFO L93 Difference]: Finished difference Result 84 states and 220 transitions. [2019-02-18 10:09:44,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:09:44,690 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 10:09:44,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:09:44,692 INFO L225 Difference]: With dead ends: 84 [2019-02-18 10:09:44,692 INFO L226 Difference]: Without dead ends: 82 [2019-02-18 10:09:44,693 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:09:44,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-02-18 10:09:44,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 43. [2019-02-18 10:09:44,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-02-18 10:09:44,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-02-18 10:09:44,703 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-02-18 10:09:44,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:09:44,704 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-02-18 10:09:44,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:09:44,704 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-02-18 10:09:44,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:09:44,704 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:09:44,705 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:09:44,705 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:09:44,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:44,705 INFO L82 PathProgramCache]: Analyzing trace with hash 954618, now seen corresponding path program 1 times [2019-02-18 10:09:44,705 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:09:44,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:44,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:44,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:44,706 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:09:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:44,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:44,811 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:09:44,811 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:09:44,811 INFO L207 CegarAbsIntRunner]: [0], [10], [32], [35] [2019-02-18 10:09:44,812 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:09:44,812 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:09:45,373 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:09:45,373 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. [2019-02-18 10:09:45,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:45,373 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:09:45,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:45,373 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 [2019-02-18 10:09:45,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:45,383 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:09:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:45,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:09:45,462 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,464 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 [2019-02-18 10:09:45,544 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,547 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,548 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 [2019-02-18 10:09:45,627 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,628 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,629 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,629 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,630 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 [2019-02-18 10:09:45,699 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,700 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,701 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,702 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,704 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,705 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,706 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 [2019-02-18 10:09:45,833 WARN L181 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-02-18 10:09:45,837 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,838 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,839 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,840 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,842 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,843 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,844 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,845 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,846 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 [2019-02-18 10:09:45,947 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,948 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,950 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,951 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,952 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,953 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,954 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,956 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,957 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,958 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:45,959 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 [2019-02-18 10:09:46,081 WARN L181 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-18 10:09:46,085 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:46,086 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:46,087 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:46,088 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:46,090 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:46,091 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:46,092 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:46,093 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:46,094 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:46,095 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:46,097 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:46,098 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:46,099 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 [2019-02-18 10:09:46,099 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:46,157 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:46,215 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:46,275 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:46,336 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:46,397 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:46,459 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:46,534 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 [2019-02-18 10:09:46,538 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 [2019-02-18 10:09:46,541 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 [2019-02-18 10:09:46,545 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 [2019-02-18 10:09:46,549 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 [2019-02-18 10:09:46,554 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 [2019-02-18 10:09:46,558 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 [2019-02-18 10:09:46,564 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 [2019-02-18 10:09:46,565 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:46,654 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:46,695 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:46,725 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:46,750 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:46,771 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:46,789 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:46,805 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:46,898 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. [2019-02-18 10:09:46,898 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-02-18 10:09:46,935 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:46,936 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 [2019-02-18 10:09:46,937 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:47,029 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. [2019-02-18 10:09:47,029 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-02-18 10:09:47,060 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:47,061 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:47,062 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:47,063 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:47,064 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:47,065 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:47,066 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:47,067 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:47,068 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:47,069 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:09:47,070 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 [2019-02-18 10:09:47,071 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:47,165 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. [2019-02-18 10:09:47,165 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-02-18 10:09:47,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:47,251 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:09:47,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:47,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:09:47,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:09:47,293 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:09:47,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:09:47,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:09:47,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:09:47,294 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-02-18 10:09:51,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:09:51,224 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-02-18 10:09:51,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:09:51,225 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 10:09:51,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:09:51,226 INFO L225 Difference]: With dead ends: 81 [2019-02-18 10:09:51,226 INFO L226 Difference]: Without dead ends: 80 [2019-02-18 10:09:51,227 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 [2019-02-18 10:09:51,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-02-18 10:09:51,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 43. [2019-02-18 10:09:51,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-02-18 10:09:51,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-02-18 10:09:51,240 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-02-18 10:09:51,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:09:51,241 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-02-18 10:09:51,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:09:51,241 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-02-18 10:09:51,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:09:51,241 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:09:51,241 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:09:51,242 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:09:51,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:51,242 INFO L82 PathProgramCache]: Analyzing trace with hash 955114, now seen corresponding path program 1 times [2019-02-18 10:09:51,242 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:09:51,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:51,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:51,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:51,243 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:09:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:51,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:51,589 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:09:51,589 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:09:51,589 INFO L207 CegarAbsIntRunner]: [0], [26], [32], [35] [2019-02-18 10:09:51,590 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:09:51,591 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:09:52,359 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:09:52,359 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. [2019-02-18 10:09:52,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:52,359 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:09:52,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:52,360 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 [2019-02-18 10:09:52,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:52,368 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:09:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:52,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:09:52,433 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,433 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 [2019-02-18 10:09:52,487 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,490 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,490 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-02-18 10:09:52,549 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,552 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,555 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,558 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,559 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 [2019-02-18 10:09:52,625 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,628 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,630 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,633 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,636 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,639 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,639 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 [2019-02-18 10:09:52,724 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,727 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,729 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,732 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,734 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,736 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,737 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,738 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,739 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 56 treesize of output 116 [2019-02-18 10:09:52,842 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,844 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,846 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,848 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,850 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,853 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,855 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,857 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,860 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,863 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,863 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 [2019-02-18 10:09:52,991 WARN L181 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-18 10:09:52,997 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:52,999 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:53,001 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:53,003 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:53,005 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:53,007 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:53,008 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:53,009 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:53,011 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:53,012 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:53,014 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:53,016 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:53,017 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 [2019-02-18 10:09:53,017 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:53,081 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:53,151 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:53,223 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:53,294 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:53,367 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:53,443 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:53,531 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 [2019-02-18 10:09:53,534 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-02-18 10:09:53,539 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 [2019-02-18 10:09:53,541 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 [2019-02-18 10:09:53,546 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 [2019-02-18 10:09:53,549 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-18 10:09:53,554 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 [2019-02-18 10:09:53,558 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 [2019-02-18 10:09:53,559 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:53,630 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:53,671 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:53,705 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:53,729 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:53,748 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:53,765 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:53,780 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:53,875 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. [2019-02-18 10:09:53,876 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-02-18 10:09:53,910 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:53,911 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 [2019-02-18 10:09:53,912 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:54,017 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. [2019-02-18 10:09:54,018 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-02-18 10:09:54,052 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:54,053 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:54,054 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:54,055 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:54,057 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:54,058 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:54,059 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:54,060 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:54,061 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:54,062 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:09:54,063 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 [2019-02-18 10:09:54,064 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:54,163 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. [2019-02-18 10:09:54,163 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-02-18 10:09:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:54,317 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:09:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:54,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:09:54,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:09:54,362 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:09:54,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:09:54,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:09:54,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:09:54,363 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-02-18 10:09:55,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:09:55,856 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-02-18 10:09:55,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:09:55,862 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 10:09:55,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:09:55,863 INFO L225 Difference]: With dead ends: 81 [2019-02-18 10:09:55,863 INFO L226 Difference]: Without dead ends: 79 [2019-02-18 10:09:55,864 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 [2019-02-18 10:09:55,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-02-18 10:09:55,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 44. [2019-02-18 10:09:55,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-02-18 10:09:55,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 175 transitions. [2019-02-18 10:09:55,884 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 175 transitions. Word has length 4 [2019-02-18 10:09:55,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:09:55,884 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 175 transitions. [2019-02-18 10:09:55,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:09:55,884 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 175 transitions. [2019-02-18 10:09:55,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:09:55,885 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:09:55,885 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:09:55,885 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:09:55,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:55,886 INFO L82 PathProgramCache]: Analyzing trace with hash 954742, now seen corresponding path program 1 times [2019-02-18 10:09:55,886 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:09:55,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:55,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:55,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:55,887 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:09:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:56,138 WARN L181 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 12 [2019-02-18 10:09:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:56,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:56,182 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:09:56,183 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:09:56,183 INFO L207 CegarAbsIntRunner]: [0], [14], [32], [35] [2019-02-18 10:09:56,184 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:09:56,185 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:09:56,886 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:09:56,886 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. [2019-02-18 10:09:56,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:56,887 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:09:56,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:56,887 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 [2019-02-18 10:09:56,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:56,895 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:09:56,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:56,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:09:56,967 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 [2019-02-18 10:09:56,970 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 [2019-02-18 10:09:56,973 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:56,975 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:56,976 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 [2019-02-18 10:09:56,979 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:56,980 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:56,980 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:56,981 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-02-18 10:09:56,986 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:56,987 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:56,989 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:56,991 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:56,991 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-18 10:09:56,995 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:56,996 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:56,998 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:56,999 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:57,001 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:57,002 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 [2019-02-18 10:09:57,007 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:57,008 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:57,009 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:57,010 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:57,011 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:57,013 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:57,014 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 [2019-02-18 10:09:57,020 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:57,021 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:57,022 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:57,023 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:57,025 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:57,026 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:57,027 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:57,028 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 [2019-02-18 10:09:57,030 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:57,121 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:57,168 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:57,201 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:57,231 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:57,257 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:57,279 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:57,299 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:57,354 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:57,355 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 [2019-02-18 10:09:57,411 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:57,412 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:57,413 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-02-18 10:09:57,471 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:57,472 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:57,474 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:57,475 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:57,476 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 [2019-02-18 10:09:58,203 WARN L181 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-02-18 10:09:58,241 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:58,266 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:58,282 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:58,305 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:58,326 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:58,351 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:58,352 INFO L303 Elim1Store]: Index analysis took 147 ms [2019-02-18 10:09:58,353 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 [2019-02-18 10:09:59,252 WARN L181 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-02-18 10:09:59,289 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,311 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,339 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,361 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,374 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,395 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,419 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,442 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,443 INFO L303 Elim1Store]: Index analysis took 188 ms [2019-02-18 10:09:59,444 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 [2019-02-18 10:10:00,566 WARN L181 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-02-18 10:10:00,605 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,616 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,617 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,618 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,619 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,620 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,622 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,624 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,626 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,627 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,628 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-02-18 10:10:00,757 WARN L181 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-18 10:10:00,764 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,769 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,769 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,770 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,771 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,772 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,772 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,773 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,776 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,778 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,778 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,779 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,780 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 [2019-02-18 10:10:00,780 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:00,840 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:00,899 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:00,962 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:01,026 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:01,089 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:01,150 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:01,247 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. [2019-02-18 10:10:01,247 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-02-18 10:10:01,282 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:01,283 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 [2019-02-18 10:10:01,284 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:01,376 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. [2019-02-18 10:10:01,377 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-02-18 10:10:01,408 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:01,409 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:01,409 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:01,411 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:01,412 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:01,413 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:01,414 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:01,415 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:01,416 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:01,417 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:01,418 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 [2019-02-18 10:10:01,419 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:01,517 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. [2019-02-18 10:10:01,518 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-02-18 10:10:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:01,597 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:01,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:01,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-18 10:10:01,652 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:01,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:10:01,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:10:01,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-02-18 10:10:01,653 INFO L87 Difference]: Start difference. First operand 44 states and 175 transitions. Second operand 8 states. [2019-02-18 10:10:05,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:05,303 INFO L93 Difference]: Finished difference Result 99 states and 274 transitions. [2019-02-18 10:10:05,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:10:05,304 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 10:10:05,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:05,305 INFO L225 Difference]: With dead ends: 99 [2019-02-18 10:10:05,305 INFO L226 Difference]: Without dead ends: 95 [2019-02-18 10:10:05,306 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-02-18 10:10:05,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-02-18 10:10:05,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 52. [2019-02-18 10:10:05,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-02-18 10:10:05,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 210 transitions. [2019-02-18 10:10:05,319 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 210 transitions. Word has length 4 [2019-02-18 10:10:05,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:05,319 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 210 transitions. [2019-02-18 10:10:05,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:10:05,320 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 210 transitions. [2019-02-18 10:10:05,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:10:05,320 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:05,320 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:10:05,321 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:05,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:05,321 INFO L82 PathProgramCache]: Analyzing trace with hash 941536, now seen corresponding path program 1 times [2019-02-18 10:10:05,321 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:05,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:05,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:05,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:05,322 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:05,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:05,430 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:05,430 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:10:05,430 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [35] [2019-02-18 10:10:05,435 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:05,435 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:05,986 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:05,986 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. [2019-02-18 10:10:05,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:05,987 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:05,987 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:05,987 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 [2019-02-18 10:10:06,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:06,007 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:06,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:06,066 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 [2019-02-18 10:10:06,071 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 [2019-02-18 10:10:06,078 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,080 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,081 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 [2019-02-18 10:10:06,086 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,088 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,090 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,091 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 [2019-02-18 10:10:06,099 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,103 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,105 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,107 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,107 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 [2019-02-18 10:10:06,113 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,115 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,117 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,119 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,121 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,122 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 [2019-02-18 10:10:06,127 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,129 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,131 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,133 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,135 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,137 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,137 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-18 10:10:06,159 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 [2019-02-18 10:10:06,159 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:06,235 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:06,283 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:06,319 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:06,348 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:06,373 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:06,392 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:06,410 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:06,455 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,456 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 [2019-02-18 10:10:06,503 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,504 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,505 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 [2019-02-18 10:10:06,554 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,555 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,556 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,557 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,558 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 [2019-02-18 10:10:06,613 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,614 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,615 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,616 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,617 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,618 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,619 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 [2019-02-18 10:10:06,692 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,693 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,694 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,695 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,696 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,697 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,699 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,700 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,701 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 [2019-02-18 10:10:06,793 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,794 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,795 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,796 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,797 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,798 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,799 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,800 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,801 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,802 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:06,803 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 [2019-02-18 10:10:06,804 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:06,843 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:06,882 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:06,924 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:06,967 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:07,009 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:07,081 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. [2019-02-18 10:10:07,082 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-18 10:10:07,143 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,144 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 [2019-02-18 10:10:07,144 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:07,220 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. [2019-02-18 10:10:07,220 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-18 10:10:07,250 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,251 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,251 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,252 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,253 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,254 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,255 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,256 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,257 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,258 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 [2019-02-18 10:10:07,259 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:07,327 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. [2019-02-18 10:10:07,328 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-02-18 10:10:07,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:07,351 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:07,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:07,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:10:07,394 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:07,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:10:07,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:10:07,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:10:07,394 INFO L87 Difference]: Start difference. First operand 52 states and 210 transitions. Second operand 8 states. [2019-02-18 10:10:07,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:07,913 INFO L93 Difference]: Finished difference Result 101 states and 289 transitions. [2019-02-18 10:10:07,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:10:07,913 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 10:10:07,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:07,914 INFO L225 Difference]: With dead ends: 101 [2019-02-18 10:10:07,915 INFO L226 Difference]: Without dead ends: 99 [2019-02-18 10:10:07,915 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:10:07,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-02-18 10:10:07,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 59. [2019-02-18 10:10:07,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-02-18 10:10:07,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 243 transitions. [2019-02-18 10:10:07,930 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 243 transitions. Word has length 4 [2019-02-18 10:10:07,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:07,930 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 243 transitions. [2019-02-18 10:10:07,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:10:07,930 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 243 transitions. [2019-02-18 10:10:07,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:10:07,931 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:07,931 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:10:07,932 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:07,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:07,932 INFO L82 PathProgramCache]: Analyzing trace with hash 941164, now seen corresponding path program 1 times [2019-02-18 10:10:07,932 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:07,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:07,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:07,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:07,933 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:08,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:08,016 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:08,016 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:10:08,017 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [35] [2019-02-18 10:10:08,018 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:08,018 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:08,288 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:08,289 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. [2019-02-18 10:10:08,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:08,289 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:08,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:08,289 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 [2019-02-18 10:10:08,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:08,298 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:08,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:08,349 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:08,350 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 [2019-02-18 10:10:08,824 WARN L181 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2019-02-18 10:10:08,860 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:08,884 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:08,886 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 [2019-02-18 10:10:09,391 WARN L181 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2019-02-18 10:10:09,394 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,396 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,397 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,398 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,399 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 [2019-02-18 10:10:09,456 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,458 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,472 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,473 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,475 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,476 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,477 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 [2019-02-18 10:10:09,552 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,553 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,554 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,554 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,555 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,557 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,558 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,559 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,560 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 [2019-02-18 10:10:09,655 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,656 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,657 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,657 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,658 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,659 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,660 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,661 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,662 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,664 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,664 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 [2019-02-18 10:10:09,665 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:09,705 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:09,746 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:09,787 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:09,830 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:09,874 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:09,928 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 [2019-02-18 10:10:09,932 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-02-18 10:10:09,935 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 [2019-02-18 10:10:09,940 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 [2019-02-18 10:10:09,943 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 [2019-02-18 10:10:09,980 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 [2019-02-18 10:10:09,992 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 [2019-02-18 10:10:10,062 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 [2019-02-18 10:10:10,064 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:10,119 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:10,162 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:10,195 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:10,221 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:10,242 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:10,259 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:10,274 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:10,345 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. [2019-02-18 10:10:10,346 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-18 10:10:10,402 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,403 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 [2019-02-18 10:10:10,403 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:10,467 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. [2019-02-18 10:10:10,468 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-18 10:10:10,497 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,497 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,498 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,500 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,501 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,502 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,503 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,504 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:10,505 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 [2019-02-18 10:10:10,505 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:10,573 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. [2019-02-18 10:10:10,573 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-02-18 10:10:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:10,602 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:10,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:10,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:10:10,679 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:10,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:10:10,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:10:10,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:10:10,680 INFO L87 Difference]: Start difference. First operand 59 states and 243 transitions. Second operand 8 states. [2019-02-18 10:10:11,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:11,566 INFO L93 Difference]: Finished difference Result 99 states and 302 transitions. [2019-02-18 10:10:11,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:10:11,566 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 10:10:11,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:11,568 INFO L225 Difference]: With dead ends: 99 [2019-02-18 10:10:11,568 INFO L226 Difference]: Without dead ends: 98 [2019-02-18 10:10:11,569 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 [2019-02-18 10:10:11,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-02-18 10:10:11,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2019-02-18 10:10:11,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-02-18 10:10:11,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 261 transitions. [2019-02-18 10:10:11,585 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 261 transitions. Word has length 4 [2019-02-18 10:10:11,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:11,585 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 261 transitions. [2019-02-18 10:10:11,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:10:11,586 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 261 transitions. [2019-02-18 10:10:11,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:10:11,586 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:11,586 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:10:11,587 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:11,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:11,587 INFO L82 PathProgramCache]: Analyzing trace with hash 941660, now seen corresponding path program 1 times [2019-02-18 10:10:11,587 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:11,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:11,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:11,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:11,588 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:11,737 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-02-18 10:10:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:11,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:11,752 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:11,752 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:10:11,752 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [35] [2019-02-18 10:10:11,754 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:11,754 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:12,016 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:12,016 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. [2019-02-18 10:10:12,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:12,016 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:12,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:12,016 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 [2019-02-18 10:10:12,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:12,026 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:12,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:12,073 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 [2019-02-18 10:10:12,078 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 [2019-02-18 10:10:12,085 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,087 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,087 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 [2019-02-18 10:10:12,091 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,093 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,094 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,095 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 [2019-02-18 10:10:12,100 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,103 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,104 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,105 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,106 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 [2019-02-18 10:10:12,110 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,111 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,113 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,115 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,117 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,118 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 [2019-02-18 10:10:12,123 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,124 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,126 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,127 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,129 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,131 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,132 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 [2019-02-18 10:10:12,201 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 [2019-02-18 10:10:12,202 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:12,263 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:12,306 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:12,344 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:12,373 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:12,398 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:12,416 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:12,458 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:12,502 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,503 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-18 10:10:12,551 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,552 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,553 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 [2019-02-18 10:10:12,602 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,603 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,604 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,605 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,606 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-18 10:10:12,669 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,670 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,671 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,672 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,673 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,674 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,675 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 [2019-02-18 10:10:12,766 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,767 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,768 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,769 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,770 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,771 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,772 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,774 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,775 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 [2019-02-18 10:10:12,867 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,868 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,869 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,870 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,871 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,872 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,873 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,874 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,875 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,876 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,877 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 [2019-02-18 10:10:12,878 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:12,948 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:12,987 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:13,027 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:13,065 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:13,105 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:13,176 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. [2019-02-18 10:10:13,176 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-18 10:10:13,224 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:13,225 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-02-18 10:10:13,225 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:13,290 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. [2019-02-18 10:10:13,291 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-18 10:10:13,344 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:13,345 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:13,345 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:13,346 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:13,347 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:13,348 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:13,349 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:13,349 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:13,350 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 [2019-02-18 10:10:13,351 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:13,420 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. [2019-02-18 10:10:13,420 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-02-18 10:10:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:13,442 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:13,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:13,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:10:13,484 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:13,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:10:13,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:10:13,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:10:13,485 INFO L87 Difference]: Start difference. First operand 61 states and 261 transitions. Second operand 8 states. [2019-02-18 10:10:14,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:14,074 INFO L93 Difference]: Finished difference Result 101 states and 320 transitions. [2019-02-18 10:10:14,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:10:14,074 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 10:10:14,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:14,075 INFO L225 Difference]: With dead ends: 101 [2019-02-18 10:10:14,076 INFO L226 Difference]: Without dead ends: 99 [2019-02-18 10:10:14,076 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 [2019-02-18 10:10:14,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-02-18 10:10:14,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 62. [2019-02-18 10:10:14,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-02-18 10:10:14,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 278 transitions. [2019-02-18 10:10:14,101 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 278 transitions. Word has length 4 [2019-02-18 10:10:14,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:14,102 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 278 transitions. [2019-02-18 10:10:14,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:10:14,102 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 278 transitions. [2019-02-18 10:10:14,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:10:14,103 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:14,103 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:10:14,103 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:14,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:14,104 INFO L82 PathProgramCache]: Analyzing trace with hash 941288, now seen corresponding path program 1 times [2019-02-18 10:10:14,104 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:14,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:14,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:14,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:14,105 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:14,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:14,211 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:14,211 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:10:14,211 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [35] [2019-02-18 10:10:14,212 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:14,213 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:14,517 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:14,518 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. [2019-02-18 10:10:14,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:14,518 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:14,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:14,518 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 [2019-02-18 10:10:14,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:14,527 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:14,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:14,751 WARN L181 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-02-18 10:10:14,789 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,790 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 [2019-02-18 10:10:15,275 WARN L181 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2019-02-18 10:10:15,314 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:15,339 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:15,340 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 [2019-02-18 10:10:15,891 WARN L181 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2019-02-18 10:10:15,930 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:15,941 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:15,943 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:15,945 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:15,946 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 [2019-02-18 10:10:16,041 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,042 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,043 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,045 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,046 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,047 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,048 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 [2019-02-18 10:10:16,138 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,141 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,143 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,145 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,147 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,149 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,152 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,154 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,154 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 [2019-02-18 10:10:16,267 WARN L181 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-02-18 10:10:16,273 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,275 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,277 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,279 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,281 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,283 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,285 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,287 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,289 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,291 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,292 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 [2019-02-18 10:10:16,292 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,342 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,385 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,436 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,486 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,528 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,585 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 [2019-02-18 10:10:16,589 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 [2019-02-18 10:10:16,592 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 [2019-02-18 10:10:16,595 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 [2019-02-18 10:10:16,599 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 [2019-02-18 10:10:16,603 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 [2019-02-18 10:10:16,607 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 [2019-02-18 10:10:16,619 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-02-18 10:10:16,619 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,675 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,716 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,749 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,776 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,797 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,813 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,830 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,912 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. [2019-02-18 10:10:16,913 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-18 10:10:16,965 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,966 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 [2019-02-18 10:10:16,967 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:17,031 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. [2019-02-18 10:10:17,032 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-18 10:10:17,083 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,083 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,084 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,085 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,085 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,086 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,087 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,088 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,089 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,090 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-02-18 10:10:17,091 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:17,163 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. [2019-02-18 10:10:17,163 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-02-18 10:10:17,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:17,187 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:17,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:17,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:10:17,229 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:17,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:10:17,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:10:17,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:10:17,230 INFO L87 Difference]: Start difference. First operand 62 states and 278 transitions. Second operand 8 states. [2019-02-18 10:10:17,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:17,918 INFO L93 Difference]: Finished difference Result 106 states and 350 transitions. [2019-02-18 10:10:17,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:10:17,919 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 10:10:17,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:17,921 INFO L225 Difference]: With dead ends: 106 [2019-02-18 10:10:17,921 INFO L226 Difference]: Without dead ends: 104 [2019-02-18 10:10:17,922 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 [2019-02-18 10:10:17,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-02-18 10:10:17,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 65. [2019-02-18 10:10:17,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-02-18 10:10:17,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 304 transitions. [2019-02-18 10:10:17,936 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 304 transitions. Word has length 4 [2019-02-18 10:10:17,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:17,936 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 304 transitions. [2019-02-18 10:10:17,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:10:17,936 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 304 transitions. [2019-02-18 10:10:17,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:10:17,937 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:17,937 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:10:17,937 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:17,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:17,938 INFO L82 PathProgramCache]: Analyzing trace with hash 941784, now seen corresponding path program 1 times [2019-02-18 10:10:17,938 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:17,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:17,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:17,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:17,939 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:18,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:18,093 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:18,094 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:10:18,094 INFO L207 CegarAbsIntRunner]: [0], [18], [30], [35] [2019-02-18 10:10:18,095 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:18,095 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:18,373 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:18,374 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. [2019-02-18 10:10:18,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:18,374 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:18,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:18,374 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 [2019-02-18 10:10:18,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:18,383 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:18,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:18,430 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 [2019-02-18 10:10:18,435 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 [2019-02-18 10:10:18,442 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,444 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,444 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 [2019-02-18 10:10:18,449 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,451 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,453 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,454 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 [2019-02-18 10:10:18,461 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,462 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,462 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,463 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,464 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 [2019-02-18 10:10:18,469 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,470 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,471 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,473 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,474 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,475 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 [2019-02-18 10:10:18,481 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,482 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,484 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,485 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,486 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,487 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,488 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 [2019-02-18 10:10:18,503 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 [2019-02-18 10:10:18,503 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:18,563 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:18,610 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:18,647 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:18,676 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:18,699 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:18,718 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:18,737 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:18,784 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,785 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 [2019-02-18 10:10:18,832 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,833 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,833 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 [2019-02-18 10:10:18,898 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,899 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,901 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,902 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,903 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 [2019-02-18 10:10:18,961 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,962 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,963 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,964 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,966 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,967 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,968 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 [2019-02-18 10:10:19,043 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,044 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,045 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,046 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,047 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,048 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,049 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,050 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,051 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 [2019-02-18 10:10:19,164 WARN L181 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-02-18 10:10:19,169 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,170 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,171 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,172 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,173 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,174 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,176 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,177 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,178 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,179 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,180 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 [2019-02-18 10:10:19,181 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:19,219 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:19,259 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:19,300 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:19,341 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:19,383 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:19,472 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. [2019-02-18 10:10:19,473 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-18 10:10:19,524 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,525 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 [2019-02-18 10:10:19,526 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:19,590 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. [2019-02-18 10:10:19,591 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-18 10:10:19,641 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,642 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,643 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,644 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,645 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,646 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,647 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,648 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,649 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,651 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 [2019-02-18 10:10:19,651 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:19,721 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. [2019-02-18 10:10:19,721 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-02-18 10:10:19,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:19,812 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:19,853 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:19,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:10:19,853 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:19,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:10:19,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:10:19,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:10:19,854 INFO L87 Difference]: Start difference. First operand 65 states and 304 transitions. Second operand 8 states. [2019-02-18 10:10:20,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:20,565 INFO L93 Difference]: Finished difference Result 107 states and 376 transitions. [2019-02-18 10:10:20,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:10:20,565 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 10:10:20,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:20,567 INFO L225 Difference]: With dead ends: 107 [2019-02-18 10:10:20,567 INFO L226 Difference]: Without dead ends: 99 [2019-02-18 10:10:20,568 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 [2019-02-18 10:10:20,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-02-18 10:10:20,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2019-02-18 10:10:20,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-02-18 10:10:20,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 328 transitions. [2019-02-18 10:10:20,582 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 328 transitions. Word has length 4 [2019-02-18 10:10:20,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:20,582 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 328 transitions. [2019-02-18 10:10:20,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:10:20,582 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 328 transitions. [2019-02-18 10:10:20,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:10:20,583 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:20,583 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:10:20,584 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:20,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:20,584 INFO L82 PathProgramCache]: Analyzing trace with hash 930314, now seen corresponding path program 1 times [2019-02-18 10:10:20,584 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:20,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:20,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:20,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:20,585 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:20,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:20,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:20,669 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:20,669 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:10:20,669 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [35] [2019-02-18 10:10:20,672 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:20,672 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:21,268 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:21,268 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. [2019-02-18 10:10:21,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:21,269 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:21,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:21,269 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 [2019-02-18 10:10:21,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:21,284 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:21,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:21,442 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-02-18 10:10:21,446 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,447 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 [2019-02-18 10:10:21,490 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,491 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,492 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 [2019-02-18 10:10:21,555 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,556 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,557 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,557 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,558 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 [2019-02-18 10:10:21,645 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,647 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,648 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,649 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,650 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,652 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,652 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-18 10:10:21,725 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,726 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,727 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,728 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,729 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,731 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,732 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,733 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,734 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 [2019-02-18 10:10:21,826 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,828 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,829 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,830 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,831 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,833 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,834 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,835 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,836 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,837 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,838 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 [2019-02-18 10:10:21,839 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:21,882 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:21,924 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:21,963 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:22,007 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:22,051 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:22,105 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 [2019-02-18 10:10:22,108 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 [2019-02-18 10:10:22,111 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 [2019-02-18 10:10:22,114 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 [2019-02-18 10:10:22,117 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 [2019-02-18 10:10:22,121 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 [2019-02-18 10:10:22,124 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 [2019-02-18 10:10:22,136 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 [2019-02-18 10:10:22,137 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:22,203 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:22,306 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:22,507 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:22,532 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:22,553 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:22,572 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:22,588 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:22,660 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. [2019-02-18 10:10:22,660 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-02-18 10:10:22,702 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:22,713 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 [2019-02-18 10:10:22,714 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:10:22,942 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. [2019-02-18 10:10:22,942 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:201 [2019-02-18 10:10:23,073 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,076 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,082 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,084 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,086 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,088 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,090 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,093 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,094 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,095 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,144 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 [2019-02-18 10:10:23,145 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-02-18 10:10:23,162 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 64 xjuncts. [2019-02-18 10:10:24,236 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:24,237 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:24,237 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:24,239 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:24,240 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:24,241 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:24,242 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:24,243 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:24,244 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 [2019-02-18 10:10:24,245 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:24,669 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. [2019-02-18 10:10:24,669 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:218, output treesize:686 [2019-02-18 10:10:25,573 WARN L181 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 114 [2019-02-18 10:10:25,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:25,575 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:25,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:25,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2019-02-18 10:10:25,601 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:25,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:10:25,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:10:25,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-02-18 10:10:25,601 INFO L87 Difference]: Start difference. First operand 66 states and 328 transitions. Second operand 8 states. [2019-02-18 10:10:26,624 WARN L181 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 117 [2019-02-18 10:10:29,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:29,725 INFO L93 Difference]: Finished difference Result 155 states and 556 transitions. [2019-02-18 10:10:29,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-02-18 10:10:29,729 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 10:10:29,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:29,731 INFO L225 Difference]: With dead ends: 155 [2019-02-18 10:10:29,731 INFO L226 Difference]: Without dead ends: 152 [2019-02-18 10:10:29,731 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:10:29,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-02-18 10:10:29,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 78. [2019-02-18 10:10:29,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-02-18 10:10:29,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 438 transitions. [2019-02-18 10:10:29,747 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 438 transitions. Word has length 4 [2019-02-18 10:10:29,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:29,747 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 438 transitions. [2019-02-18 10:10:29,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:10:29,747 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 438 transitions. [2019-02-18 10:10:29,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:10:29,748 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:29,748 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:10:29,748 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:29,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:29,749 INFO L82 PathProgramCache]: Analyzing trace with hash 930440, now seen corresponding path program 1 times [2019-02-18 10:10:29,749 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:29,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:29,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:29,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:29,750 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:29,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:29,932 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:29,932 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:10:29,932 INFO L207 CegarAbsIntRunner]: [0], [6], [36], [37] [2019-02-18 10:10:29,933 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:29,933 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:30,217 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:30,218 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. [2019-02-18 10:10:30,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:30,218 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:30,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:30,218 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 [2019-02-18 10:10:30,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:30,226 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:30,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:30,261 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 [2019-02-18 10:10:30,264 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 [2019-02-18 10:10:30,271 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,273 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,274 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 [2019-02-18 10:10:30,281 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,283 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,285 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,286 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 10:10:30,292 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,294 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,298 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,301 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,301 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 [2019-02-18 10:10:30,308 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,310 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,312 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,313 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,315 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,316 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-18 10:10:30,321 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,322 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,323 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,325 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,327 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,328 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,329 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 [2019-02-18 10:10:30,341 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 [2019-02-18 10:10:30,342 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:30,402 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:30,449 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:30,486 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:30,514 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:30,538 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:30,557 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:30,576 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:30,622 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,623 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-18 10:10:30,668 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,669 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,670 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 [2019-02-18 10:10:30,719 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,720 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,721 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,722 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,723 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 [2019-02-18 10:10:30,780 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,781 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,782 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,783 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,784 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,785 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,786 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 [2019-02-18 10:10:30,860 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,861 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,863 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,864 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,865 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,866 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,868 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,869 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,870 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-18 10:10:30,965 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,966 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,967 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,968 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,970 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,971 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,972 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,973 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,974 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,975 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,976 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 [2019-02-18 10:10:30,977 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:31,017 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:31,056 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:31,095 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:31,137 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:31,175 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:31,248 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. [2019-02-18 10:10:31,249 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-02-18 10:10:31,287 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,288 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 [2019-02-18 10:10:31,288 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:31,355 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. [2019-02-18 10:10:31,356 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-02-18 10:10:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:31,376 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:31,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:31,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 10:10:31,404 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:31,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 10:10:31,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 10:10:31,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 10:10:31,405 INFO L87 Difference]: Start difference. First operand 78 states and 438 transitions. Second operand 6 states. [2019-02-18 10:10:31,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:31,772 INFO L93 Difference]: Finished difference Result 104 states and 471 transitions. [2019-02-18 10:10:31,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 10:10:31,773 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-02-18 10:10:31,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:31,775 INFO L225 Difference]: With dead ends: 104 [2019-02-18 10:10:31,775 INFO L226 Difference]: Without dead ends: 103 [2019-02-18 10:10:31,776 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 [2019-02-18 10:10:31,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-02-18 10:10:31,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2019-02-18 10:10:31,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-02-18 10:10:31,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-02-18 10:10:31,792 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-02-18 10:10:31,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:31,792 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-02-18 10:10:31,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 10:10:31,792 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-02-18 10:10:31,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:10:31,793 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:31,793 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:10:31,793 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:31,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:31,793 INFO L82 PathProgramCache]: Analyzing trace with hash 945816, now seen corresponding path program 1 times [2019-02-18 10:10:31,793 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:31,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:31,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:31,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:31,794 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:31,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:31,830 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:31,830 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:10:31,830 INFO L207 CegarAbsIntRunner]: [0], [22], [36], [37] [2019-02-18 10:10:31,831 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:31,831 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:32,000 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:32,001 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. [2019-02-18 10:10:32,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:32,001 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:32,001 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:32,001 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 [2019-02-18 10:10:32,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:32,010 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:32,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:32,023 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2019-02-18 10:10:32,029 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 [2019-02-18 10:10:32,037 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,039 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,040 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2019-02-18 10:10:32,047 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,049 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,051 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,052 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 [2019-02-18 10:10:32,059 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,063 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,065 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,067 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,068 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 [2019-02-18 10:10:32,072 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,074 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,078 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,080 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,082 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,083 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 [2019-02-18 10:10:32,091 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,093 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,095 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,099 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,100 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,102 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,103 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 [2019-02-18 10:10:32,118 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-02-18 10:10:32,119 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:32,190 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:32,232 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:32,266 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:32,292 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:32,311 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:32,330 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:32,348 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:32,387 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 [2019-02-18 10:10:32,407 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,409 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,410 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2019-02-18 10:10:32,452 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,454 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,456 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,457 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,458 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 [2019-02-18 10:10:32,512 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,513 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,515 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,516 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,517 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,519 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,520 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-18 10:10:32,588 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,589 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,590 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,592 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,593 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,594 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,595 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,597 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,598 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 [2019-02-18 10:10:32,682 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,683 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,684 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,685 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,686 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,687 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,688 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,690 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,691 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,693 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,694 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 [2019-02-18 10:10:32,694 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:32,730 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:32,766 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:32,800 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:32,838 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:32,878 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:32,944 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. [2019-02-18 10:10:32,944 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-02-18 10:10:32,976 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:32,977 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 [2019-02-18 10:10:32,977 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:33,038 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. [2019-02-18 10:10:33,038 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-02-18 10:10:33,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:33,056 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:33,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:33,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 10:10:33,086 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:33,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 10:10:33,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 10:10:33,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 10:10:33,087 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 6 states. [2019-02-18 10:10:33,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:33,416 INFO L93 Difference]: Finished difference Result 108 states and 483 transitions. [2019-02-18 10:10:33,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 10:10:33,417 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-02-18 10:10:33,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:33,418 INFO L225 Difference]: With dead ends: 108 [2019-02-18 10:10:33,418 INFO L226 Difference]: Without dead ends: 107 [2019-02-18 10:10:33,418 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 [2019-02-18 10:10:33,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-02-18 10:10:33,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2019-02-18 10:10:33,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-02-18 10:10:33,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-02-18 10:10:33,437 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-02-18 10:10:33,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:33,438 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-02-18 10:10:33,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 10:10:33,438 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-02-18 10:10:33,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:10:33,438 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:33,439 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:10:33,439 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:33,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:33,439 INFO L82 PathProgramCache]: Analyzing trace with hash 945008, now seen corresponding path program 1 times [2019-02-18 10:10:33,439 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:33,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:33,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:33,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:33,440 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:33,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:33,569 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:33,570 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:10:33,570 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [35] [2019-02-18 10:10:33,571 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:33,571 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:33,808 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:33,808 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. [2019-02-18 10:10:33,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:33,808 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:33,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:33,808 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 [2019-02-18 10:10:33,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:33,817 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:33,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:33,867 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:33,867 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 [2019-02-18 10:10:33,922 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:33,923 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:33,924 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-02-18 10:10:33,973 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:33,974 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:33,976 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:33,977 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:33,978 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 [2019-02-18 10:10:34,036 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,037 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,038 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,040 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,041 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,042 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,043 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 [2019-02-18 10:10:34,112 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,114 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,115 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,116 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,117 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,119 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,120 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,121 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,122 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 [2019-02-18 10:10:34,213 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,214 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,215 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,217 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,218 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,219 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,220 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,221 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,222 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,224 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,224 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 [2019-02-18 10:10:34,225 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,266 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,307 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,349 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,392 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,435 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,487 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 [2019-02-18 10:10:34,491 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-02-18 10:10:34,494 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2019-02-18 10:10:34,498 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 [2019-02-18 10:10:34,512 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-18 10:10:34,516 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 [2019-02-18 10:10:34,519 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 [2019-02-18 10:10:34,531 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 [2019-02-18 10:10:34,532 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,586 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,626 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,658 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,681 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,701 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,715 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,732 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,806 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. [2019-02-18 10:10:34,807 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-18 10:10:34,861 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,862 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 [2019-02-18 10:10:34,863 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,942 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. [2019-02-18 10:10:34,942 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-18 10:10:35,015 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:35,037 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:35,061 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:35,067 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:35,068 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:35,069 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:35,070 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:35,071 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:35,072 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:35,073 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-02-18 10:10:35,074 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:35,147 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. [2019-02-18 10:10:35,147 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-02-18 10:10:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:35,171 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:35,224 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:35,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-18 10:10:35,224 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:35,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:10:35,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:10:35,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-02-18 10:10:35,225 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 8 states. [2019-02-18 10:10:36,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:36,895 INFO L93 Difference]: Finished difference Result 154 states and 652 transitions. [2019-02-18 10:10:36,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:10:36,898 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 10:10:36,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:36,900 INFO L225 Difference]: With dead ends: 154 [2019-02-18 10:10:36,900 INFO L226 Difference]: Without dead ends: 153 [2019-02-18 10:10:36,901 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 [2019-02-18 10:10:36,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-02-18 10:10:36,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 92. [2019-02-18 10:10:36,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-02-18 10:10:36,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 556 transitions. [2019-02-18 10:10:36,923 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 556 transitions. Word has length 4 [2019-02-18 10:10:36,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:36,923 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 556 transitions. [2019-02-18 10:10:36,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:10:36,923 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 556 transitions. [2019-02-18 10:10:36,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:10:36,924 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:36,924 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:10:36,924 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:36,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:36,924 INFO L82 PathProgramCache]: Analyzing trace with hash 945504, now seen corresponding path program 1 times [2019-02-18 10:10:36,925 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:36,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:36,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:36,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:36,926 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:37,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:37,051 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:37,051 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:10:37,051 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [35] [2019-02-18 10:10:37,052 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:37,052 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:37,294 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:37,295 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. [2019-02-18 10:10:37,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:37,295 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:37,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:37,295 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-02-18 10:10:37,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:37,304 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:37,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:37,348 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 [2019-02-18 10:10:37,352 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 [2019-02-18 10:10:37,359 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,361 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,362 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 [2019-02-18 10:10:37,367 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,369 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,371 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,372 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 [2019-02-18 10:10:37,376 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,378 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,380 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,382 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,383 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 [2019-02-18 10:10:37,391 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,393 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,393 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,396 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,396 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,397 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 [2019-02-18 10:10:37,402 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,403 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,405 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,407 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,408 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,410 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,411 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 [2019-02-18 10:10:37,423 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 [2019-02-18 10:10:37,424 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:37,485 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:37,534 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:37,571 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:37,600 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:37,624 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:37,645 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:37,664 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:37,711 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,712 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 [2019-02-18 10:10:37,758 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,759 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,760 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 [2019-02-18 10:10:37,810 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,811 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,812 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,813 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,814 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 [2019-02-18 10:10:37,870 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,871 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,872 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,873 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,875 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,876 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,877 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 [2019-02-18 10:10:37,945 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,946 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,947 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,948 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,950 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,951 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,952 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,953 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,954 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 [2019-02-18 10:10:38,047 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,048 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,050 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,051 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,052 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,053 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,054 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,055 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,056 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,057 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,058 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 [2019-02-18 10:10:38,059 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:38,097 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:38,136 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:38,175 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:38,216 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:38,254 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:38,323 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. [2019-02-18 10:10:38,324 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-18 10:10:38,371 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,371 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 [2019-02-18 10:10:38,372 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:38,439 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. [2019-02-18 10:10:38,439 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-18 10:10:38,466 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,466 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,467 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,468 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,470 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,471 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,472 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,473 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,474 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,475 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 [2019-02-18 10:10:38,476 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:38,544 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. [2019-02-18 10:10:38,545 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-02-18 10:10:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:38,564 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:38,618 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:38,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-18 10:10:38,618 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:38,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:10:38,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:10:38,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-02-18 10:10:38,619 INFO L87 Difference]: Start difference. First operand 92 states and 556 transitions. Second operand 8 states. [2019-02-18 10:10:39,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:39,298 INFO L93 Difference]: Finished difference Result 148 states and 688 transitions. [2019-02-18 10:10:39,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-18 10:10:39,298 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 10:10:39,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:39,300 INFO L225 Difference]: With dead ends: 148 [2019-02-18 10:10:39,301 INFO L226 Difference]: Without dead ends: 146 [2019-02-18 10:10:39,301 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:10:39,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-02-18 10:10:39,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2019-02-18 10:10:39,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-02-18 10:10:39,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 590 transitions. [2019-02-18 10:10:39,319 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 590 transitions. Word has length 4 [2019-02-18 10:10:39,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:39,319 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 590 transitions. [2019-02-18 10:10:39,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:10:39,319 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 590 transitions. [2019-02-18 10:10:39,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:10:39,320 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:39,320 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:10:39,320 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:39,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:39,321 INFO L82 PathProgramCache]: Analyzing trace with hash 933972, now seen corresponding path program 1 times [2019-02-18 10:10:39,321 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:39,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:39,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:39,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:39,322 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:39,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:39,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:39,413 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:39,413 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:10:39,413 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [35] [2019-02-18 10:10:39,414 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:39,414 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:39,650 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:39,650 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. [2019-02-18 10:10:39,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:39,650 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:39,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:39,650 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-02-18 10:10:39,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:39,658 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:39,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:39,724 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 [2019-02-18 10:10:39,726 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 [2019-02-18 10:10:39,733 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,734 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,735 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2019-02-18 10:10:39,739 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,740 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,741 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,742 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-02-18 10:10:39,748 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,749 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,750 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,752 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,753 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 [2019-02-18 10:10:39,764 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,766 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,768 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,770 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,772 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,772 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 [2019-02-18 10:10:39,781 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,782 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,783 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,784 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,786 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,788 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,789 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 [2019-02-18 10:10:39,801 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 [2019-02-18 10:10:39,802 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:39,857 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:39,902 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:39,937 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:39,967 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:39,991 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:40,011 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:40,030 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:40,076 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,077 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 [2019-02-18 10:10:40,119 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,121 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,122 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 [2019-02-18 10:10:40,167 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,169 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,170 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,171 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,172 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 [2019-02-18 10:10:40,228 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,229 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,230 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,231 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,232 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,233 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,234 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 [2019-02-18 10:10:40,308 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,309 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,310 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,311 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,312 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,314 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,315 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,316 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,317 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 [2019-02-18 10:10:40,408 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,409 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,410 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,412 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,413 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,414 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,415 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,416 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,418 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,419 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,419 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 [2019-02-18 10:10:40,420 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:40,459 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:40,498 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:40,538 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:40,580 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:40,620 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:40,691 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. [2019-02-18 10:10:40,691 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-18 10:10:40,744 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,745 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 [2019-02-18 10:10:40,746 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:40,813 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. [2019-02-18 10:10:40,813 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-18 10:10:40,838 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,839 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,839 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,840 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,842 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,843 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,844 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,845 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,846 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:40,847 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 [2019-02-18 10:10:40,847 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:40,915 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. [2019-02-18 10:10:40,915 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:82 [2019-02-18 10:10:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:40,935 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:40,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:40,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:40,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:10:40,978 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:40,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:10:40,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:10:40,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:10:40,979 INFO L87 Difference]: Start difference. First operand 103 states and 590 transitions. Second operand 8 states. [2019-02-18 10:10:41,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:41,468 INFO L93 Difference]: Finished difference Result 145 states and 646 transitions. [2019-02-18 10:10:41,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:10:41,468 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 10:10:41,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:41,470 INFO L225 Difference]: With dead ends: 145 [2019-02-18 10:10:41,471 INFO L226 Difference]: Without dead ends: 143 [2019-02-18 10:10:41,471 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 [2019-02-18 10:10:41,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-02-18 10:10:41,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2019-02-18 10:10:41,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-02-18 10:10:41,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 599 transitions. [2019-02-18 10:10:41,495 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 599 transitions. Word has length 4 [2019-02-18 10:10:41,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:41,496 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 599 transitions. [2019-02-18 10:10:41,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:10:41,496 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 599 transitions. [2019-02-18 10:10:41,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:10:41,496 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:41,497 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:10:41,497 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:41,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:41,497 INFO L82 PathProgramCache]: Analyzing trace with hash 938128, now seen corresponding path program 1 times [2019-02-18 10:10:41,497 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:41,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:41,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:41,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:41,498 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:41,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:41,546 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:41,546 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:10:41,546 INFO L207 CegarAbsIntRunner]: [0], [14], [36], [37] [2019-02-18 10:10:41,548 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:41,548 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:41,742 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:41,742 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. [2019-02-18 10:10:41,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:41,742 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:41,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:41,742 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-02-18 10:10:41,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:41,751 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:41,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:41,761 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 [2019-02-18 10:10:41,765 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 [2019-02-18 10:10:41,772 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,774 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,774 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 [2019-02-18 10:10:41,783 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,786 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,788 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,789 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 [2019-02-18 10:10:41,796 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,800 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,802 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,805 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,805 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 [2019-02-18 10:10:41,814 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,816 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,820 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,822 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,824 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,825 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 [2019-02-18 10:10:41,833 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,835 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,837 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,841 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,843 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,845 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,846 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 [2019-02-18 10:10:41,865 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-02-18 10:10:41,866 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:41,940 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:41,981 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:42,016 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:42,041 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:42,064 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:42,083 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:42,101 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:42,140 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2019-02-18 10:10:42,160 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,163 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,164 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 [2019-02-18 10:10:42,210 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,211 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,214 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,215 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,215 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-18 10:10:42,270 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,271 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,272 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,273 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,275 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,277 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,278 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 [2019-02-18 10:10:42,345 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,346 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,347 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,348 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,350 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,351 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,352 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,354 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,355 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 [2019-02-18 10:10:42,440 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,442 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,443 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,444 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,445 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,446 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,447 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,448 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,449 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,451 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,452 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 [2019-02-18 10:10:42,453 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:42,491 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:42,528 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:42,566 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:42,603 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:42,645 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:42,710 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. [2019-02-18 10:10:42,711 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-02-18 10:10:42,775 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,776 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 [2019-02-18 10:10:42,777 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:42,838 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. [2019-02-18 10:10:42,839 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-02-18 10:10:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:42,934 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:42,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:42,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 10:10:42,966 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:42,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 10:10:42,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 10:10:42,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 10:10:42,967 INFO L87 Difference]: Start difference. First operand 104 states and 599 transitions. Second operand 6 states. [2019-02-18 10:10:43,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:43,330 INFO L93 Difference]: Finished difference Result 124 states and 613 transitions. [2019-02-18 10:10:43,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 10:10:43,331 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-02-18 10:10:43,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:43,333 INFO L225 Difference]: With dead ends: 124 [2019-02-18 10:10:43,333 INFO L226 Difference]: Without dead ends: 123 [2019-02-18 10:10:43,333 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 [2019-02-18 10:10:43,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-02-18 10:10:43,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2019-02-18 10:10:43,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-02-18 10:10:43,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 598 transitions. [2019-02-18 10:10:43,351 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 598 transitions. Word has length 4 [2019-02-18 10:10:43,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:43,351 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 598 transitions. [2019-02-18 10:10:43,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 10:10:43,352 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 598 transitions. [2019-02-18 10:10:43,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:10:43,352 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:43,352 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:10:43,353 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:43,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:43,353 INFO L82 PathProgramCache]: Analyzing trace with hash 937816, now seen corresponding path program 1 times [2019-02-18 10:10:43,353 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:43,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:43,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:43,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:43,354 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:43,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:43,516 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:43,516 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:10:43,516 INFO L207 CegarAbsIntRunner]: [0], [14], [26], [35] [2019-02-18 10:10:43,517 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:43,518 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:43,816 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:43,816 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. [2019-02-18 10:10:43,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:43,816 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:43,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:43,816 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-02-18 10:10:43,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:43,825 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:43,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:43,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:43,866 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 [2019-02-18 10:10:43,872 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 [2019-02-18 10:10:43,883 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:43,884 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:43,884 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 [2019-02-18 10:10:43,888 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:43,889 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:43,891 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:43,892 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 [2019-02-18 10:10:43,896 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:43,898 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:43,899 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:43,901 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:43,902 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 [2019-02-18 10:10:43,906 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:43,907 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:43,908 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:43,909 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:43,910 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:43,911 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 [2019-02-18 10:10:43,916 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:43,918 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:43,920 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:43,921 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:43,923 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:43,925 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:43,926 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-18 10:10:43,936 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 [2019-02-18 10:10:43,937 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:43,996 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:44,043 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:44,080 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:44,108 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:44,132 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:44,150 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:44,169 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:44,213 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,214 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 [2019-02-18 10:10:44,259 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,261 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,261 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 [2019-02-18 10:10:44,310 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,312 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,313 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,314 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,315 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 [2019-02-18 10:10:44,376 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,377 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,378 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,379 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,380 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,382 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,382 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 [2019-02-18 10:10:44,455 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,456 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,457 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,458 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,459 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,460 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,462 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,463 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,463 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 [2019-02-18 10:10:44,555 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,556 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,557 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,558 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,559 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,560 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,562 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,563 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,564 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,565 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,566 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 [2019-02-18 10:10:44,566 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:44,605 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:44,645 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:44,686 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:44,726 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:44,766 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:44,839 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. [2019-02-18 10:10:44,839 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-18 10:10:44,921 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:44,922 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 [2019-02-18 10:10:44,923 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:44,991 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. [2019-02-18 10:10:44,992 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-18 10:10:45,022 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:45,023 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:45,024 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:45,026 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:45,027 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:45,028 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:45,060 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:45,081 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:45,104 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:45,105 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 [2019-02-18 10:10:45,106 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:45,288 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. [2019-02-18 10:10:45,288 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-02-18 10:10:45,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:45,310 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:45,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:45,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-18 10:10:45,356 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:45,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:10:45,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:10:45,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-02-18 10:10:45,357 INFO L87 Difference]: Start difference. First operand 104 states and 598 transitions. Second operand 8 states. [2019-02-18 10:10:46,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:46,278 INFO L93 Difference]: Finished difference Result 176 states and 800 transitions. [2019-02-18 10:10:46,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:10:46,279 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 10:10:46,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:46,281 INFO L225 Difference]: With dead ends: 176 [2019-02-18 10:10:46,281 INFO L226 Difference]: Without dead ends: 174 [2019-02-18 10:10:46,282 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-02-18 10:10:46,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-02-18 10:10:46,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 108. [2019-02-18 10:10:46,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-02-18 10:10:46,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-02-18 10:10:46,310 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-02-18 10:10:46,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:46,310 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-02-18 10:10:46,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:10:46,310 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-02-18 10:10:46,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:10:46,311 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:46,311 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:10:46,311 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:46,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:46,311 INFO L82 PathProgramCache]: Analyzing trace with hash 953504, now seen corresponding path program 1 times [2019-02-18 10:10:46,311 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:46,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:46,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:46,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:46,312 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:46,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:46,416 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:46,416 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:10:46,416 INFO L207 CegarAbsIntRunner]: [0], [30], [36], [37] [2019-02-18 10:10:46,416 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:46,417 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:46,583 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:46,583 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. [2019-02-18 10:10:46,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:46,584 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:46,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:46,584 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 [2019-02-18 10:10:46,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:46,592 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:46,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:46,605 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 [2019-02-18 10:10:46,633 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,637 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,638 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 [2019-02-18 10:10:46,688 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,689 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,691 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,692 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-02-18 10:10:46,743 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,744 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,745 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,746 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,747 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,750 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,751 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-18 10:10:46,821 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,822 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,822 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,824 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,825 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,827 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,831 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,838 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,838 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 [2019-02-18 10:10:46,952 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2019-02-18 10:10:46,955 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,956 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,957 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,959 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,960 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,961 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,962 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,964 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,965 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,967 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,968 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 [2019-02-18 10:10:46,968 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:47,007 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:47,047 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:47,086 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:47,128 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:47,177 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:47,227 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 [2019-02-18 10:10:47,234 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 [2019-02-18 10:10:47,240 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 [2019-02-18 10:10:47,244 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 [2019-02-18 10:10:47,247 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 [2019-02-18 10:10:47,254 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 [2019-02-18 10:10:47,260 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 [2019-02-18 10:10:47,274 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 [2019-02-18 10:10:47,275 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:47,326 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:47,366 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:47,397 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:47,420 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:47,439 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:47,454 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:47,470 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:47,538 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. [2019-02-18 10:10:47,538 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-02-18 10:10:47,574 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,575 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 [2019-02-18 10:10:47,575 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:47,635 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. [2019-02-18 10:10:47,635 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-02-18 10:10:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:47,684 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:47,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:47,712 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:47,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 10:10:47,712 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:47,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 10:10:47,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 10:10:47,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 10:10:47,713 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 6 states. [2019-02-18 10:10:48,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:48,013 INFO L93 Difference]: Finished difference Result 135 states and 696 transitions. [2019-02-18 10:10:48,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 10:10:48,014 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-02-18 10:10:48,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:48,016 INFO L225 Difference]: With dead ends: 135 [2019-02-18 10:10:48,016 INFO L226 Difference]: Without dead ends: 134 [2019-02-18 10:10:48,017 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 [2019-02-18 10:10:48,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-02-18 10:10:48,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 108. [2019-02-18 10:10:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-02-18 10:10:48,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-02-18 10:10:48,039 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-02-18 10:10:48,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:48,039 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-02-18 10:10:48,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 10:10:48,040 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-02-18 10:10:48,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:10:48,040 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:48,040 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:10:48,041 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:48,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:48,041 INFO L82 PathProgramCache]: Analyzing trace with hash 29600478, now seen corresponding path program 1 times [2019-02-18 10:10:48,041 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:48,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:48,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:48,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:48,042 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:48,214 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 16 [2019-02-18 10:10:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:48,311 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:48,311 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:48,311 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:10:48,311 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [32], [35] [2019-02-18 10:10:48,312 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:48,312 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:49,006 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:49,007 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. [2019-02-18 10:10:49,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:49,007 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:49,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:49,007 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 [2019-02-18 10:10:49,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:49,015 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:49,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:49,152 WARN L181 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-02-18 10:10:49,154 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2019-02-18 10:10:49,156 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 [2019-02-18 10:10:49,161 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,162 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,162 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 [2019-02-18 10:10:49,166 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,167 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,168 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,169 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 [2019-02-18 10:10:49,174 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,175 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,177 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,179 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,179 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 [2019-02-18 10:10:49,183 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,185 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,186 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,187 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,189 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,190 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 [2019-02-18 10:10:49,194 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,195 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,196 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,196 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,198 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,199 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,200 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 [2019-02-18 10:10:49,205 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,206 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,206 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,207 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,209 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,210 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,211 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,212 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 [2019-02-18 10:10:49,213 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:49,292 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:49,340 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:49,378 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:49,407 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:49,432 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:49,453 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:49,473 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:49,523 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,524 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 [2019-02-18 10:10:49,578 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,579 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,580 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-18 10:10:49,637 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,638 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,640 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,641 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,641 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 [2019-02-18 10:10:49,708 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,709 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,710 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,711 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,712 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,714 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,714 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 [2019-02-18 10:10:49,794 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,796 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,797 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,798 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,799 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,801 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,802 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,803 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,804 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 [2019-02-18 10:10:49,907 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,908 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,909 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,910 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,911 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,913 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,914 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,915 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,916 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,917 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,918 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 [2019-02-18 10:10:50,042 WARN L181 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-18 10:10:50,047 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,047 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,048 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,049 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,050 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,050 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,052 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,053 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,054 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,055 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,056 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,057 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,058 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 [2019-02-18 10:10:50,059 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:50,124 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:50,179 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:50,238 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:50,298 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:50,359 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:50,420 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:50,516 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. [2019-02-18 10:10:50,516 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-02-18 10:10:50,554 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,555 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 [2019-02-18 10:10:50,556 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:50,650 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. [2019-02-18 10:10:50,650 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-02-18 10:10:50,686 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,687 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,688 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,689 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,690 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,691 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,693 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,694 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,695 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,695 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:50,696 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 [2019-02-18 10:10:50,697 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:50,793 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. [2019-02-18 10:10:50,793 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-02-18 10:10:50,827 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,828 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,829 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,829 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,830 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,831 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,832 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,833 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,834 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,835 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,836 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,838 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,839 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,840 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,841 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:50,842 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 [2019-02-18 10:10:50,843 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:50,942 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. [2019-02-18 10:10:50,943 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:89 [2019-02-18 10:10:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:50,983 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:51,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:51,040 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:51,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-02-18 10:10:51,041 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:51,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:10:51,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:10:51,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:10:51,041 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 10 states. [2019-02-18 10:10:52,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:52,143 INFO L93 Difference]: Finished difference Result 212 states and 968 transitions. [2019-02-18 10:10:52,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-02-18 10:10:52,143 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-18 10:10:52,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:52,146 INFO L225 Difference]: With dead ends: 212 [2019-02-18 10:10:52,147 INFO L226 Difference]: Without dead ends: 205 [2019-02-18 10:10:52,147 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-02-18 10:10:52,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-02-18 10:10:52,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 122. [2019-02-18 10:10:52,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-02-18 10:10:52,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 789 transitions. [2019-02-18 10:10:52,176 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 789 transitions. Word has length 5 [2019-02-18 10:10:52,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:52,176 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 789 transitions. [2019-02-18 10:10:52,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:10:52,176 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 789 transitions. [2019-02-18 10:10:52,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:10:52,177 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:52,177 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:10:52,178 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:52,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:52,178 INFO L82 PathProgramCache]: Analyzing trace with hash 29600106, now seen corresponding path program 1 times [2019-02-18 10:10:52,178 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:52,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:52,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:52,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:52,179 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:52,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:52,297 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:52,297 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:10:52,297 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [32], [35] [2019-02-18 10:10:52,298 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:52,298 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:52,991 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:52,991 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. [2019-02-18 10:10:52,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:52,991 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:52,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:52,991 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 [2019-02-18 10:10:53,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:53,000 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:53,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:53,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:53,060 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,060 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 [2019-02-18 10:10:53,117 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,121 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,122 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 [2019-02-18 10:10:53,182 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,184 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,187 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,189 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,190 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-18 10:10:53,257 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,259 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,261 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,264 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,266 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,269 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,269 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 [2019-02-18 10:10:53,354 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,357 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,360 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,363 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,365 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,368 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,371 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,374 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,374 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-18 10:10:53,482 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,485 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,488 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,490 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,493 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,495 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,497 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,500 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,502 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,505 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,506 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 [2019-02-18 10:10:53,632 WARN L181 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-18 10:10:53,645 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,646 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,648 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,649 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,651 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,653 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,654 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,656 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,659 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,660 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,661 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,663 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,664 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 [2019-02-18 10:10:53,665 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:53,743 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:53,815 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:53,883 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:53,957 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:54,027 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:54,101 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:54,191 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 [2019-02-18 10:10:54,194 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 [2019-02-18 10:10:54,198 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 [2019-02-18 10:10:54,202 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-02-18 10:10:54,206 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-18 10:10:54,210 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 [2019-02-18 10:10:54,213 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 [2019-02-18 10:10:54,219 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 [2019-02-18 10:10:54,220 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:54,381 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:54,424 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:54,458 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:54,484 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:54,505 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:54,522 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:54,538 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:54,636 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. [2019-02-18 10:10:54,636 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-02-18 10:10:54,689 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,690 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 [2019-02-18 10:10:54,690 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:54,786 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. [2019-02-18 10:10:54,786 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-02-18 10:10:54,822 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,823 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,824 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,825 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,825 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,826 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,827 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,829 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,830 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,830 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:54,831 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 [2019-02-18 10:10:54,832 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:54,929 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. [2019-02-18 10:10:54,929 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-02-18 10:10:54,963 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,964 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,965 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,966 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,967 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,969 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,970 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,971 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,972 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,974 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,975 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,976 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,977 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,978 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:54,979 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 [2019-02-18 10:10:54,980 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:55,073 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. [2019-02-18 10:10:55,074 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-02-18 10:10:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:55,106 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:55,169 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:55,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-18 10:10:55,169 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:55,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:10:55,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:10:55,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:10:55,170 INFO L87 Difference]: Start difference. First operand 122 states and 789 transitions. Second operand 10 states. [2019-02-18 10:10:59,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:59,108 INFO L93 Difference]: Finished difference Result 169 states and 850 transitions. [2019-02-18 10:10:59,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-18 10:10:59,108 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-18 10:10:59,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:59,110 INFO L225 Difference]: With dead ends: 169 [2019-02-18 10:10:59,110 INFO L226 Difference]: Without dead ends: 168 [2019-02-18 10:10:59,110 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:10:59,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-02-18 10:10:59,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2019-02-18 10:10:59,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-02-18 10:10:59,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 762 transitions. [2019-02-18 10:10:59,144 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 762 transitions. Word has length 5 [2019-02-18 10:10:59,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:59,145 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 762 transitions. [2019-02-18 10:10:59,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:10:59,145 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 762 transitions. [2019-02-18 10:10:59,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:10:59,146 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:59,146 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:10:59,146 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:59,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:59,146 INFO L82 PathProgramCache]: Analyzing trace with hash 29600602, now seen corresponding path program 1 times [2019-02-18 10:10:59,146 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:59,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:59,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:59,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:59,147 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:59,632 WARN L181 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2019-02-18 10:10:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:59,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:59,691 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:59,691 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:10:59,692 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [32], [35] [2019-02-18 10:10:59,695 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:59,695 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:11:01,072 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:11:01,072 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. [2019-02-18 10:11:01,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:11:01,072 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:11:01,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:11:01,073 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 [2019-02-18 10:11:01,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:11:01,082 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:11:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:11:01,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:11:01,132 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,133 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 [2019-02-18 10:11:01,189 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,190 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,190 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 [2019-02-18 10:11:01,246 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,247 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,247 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,248 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,249 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-18 10:11:01,318 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,319 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,320 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,321 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,322 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,323 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,324 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 [2019-02-18 10:11:01,408 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,409 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,410 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,411 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,412 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,413 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,414 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,416 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,416 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 [2019-02-18 10:11:01,519 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,520 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,521 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,522 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,524 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,525 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,526 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,527 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,528 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,530 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,531 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 [2019-02-18 10:11:01,657 WARN L181 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-18 10:11:01,661 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,662 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,662 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,664 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,665 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,666 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,667 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,668 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,669 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,671 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,672 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,673 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,674 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 [2019-02-18 10:11:01,675 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:01,731 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:01,790 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:01,850 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:01,911 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:01,973 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:02,037 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:02,111 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 [2019-02-18 10:11:02,115 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 [2019-02-18 10:11:02,117 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2019-02-18 10:11:02,121 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 [2019-02-18 10:11:02,125 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 [2019-02-18 10:11:02,128 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 [2019-02-18 10:11:02,133 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 [2019-02-18 10:11:02,137 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 [2019-02-18 10:11:02,137 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:02,214 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:02,256 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:02,288 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:02,315 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:02,336 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:02,353 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:02,370 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:02,467 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. [2019-02-18 10:11:02,468 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-02-18 10:11:02,507 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,508 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 [2019-02-18 10:11:02,509 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:02,604 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. [2019-02-18 10:11:02,604 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-02-18 10:11:02,639 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,639 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,640 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,641 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,642 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,643 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,645 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,646 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,647 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,647 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:02,648 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 [2019-02-18 10:11:02,649 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:02,744 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. [2019-02-18 10:11:02,745 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-02-18 10:11:02,794 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,795 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,796 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,798 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,799 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,800 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,801 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,802 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,804 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,805 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,806 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,807 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,809 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,809 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:02,810 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 [2019-02-18 10:11:02,811 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:02,906 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. [2019-02-18 10:11:02,907 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-02-18 10:11:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:02,971 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:11:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:03,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:11:03,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-18 10:11:03,031 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:11:03,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:11:03,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:11:03,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:11:03,032 INFO L87 Difference]: Start difference. First operand 119 states and 762 transitions. Second operand 10 states. [2019-02-18 10:11:04,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:11:04,736 INFO L93 Difference]: Finished difference Result 176 states and 845 transitions. [2019-02-18 10:11:04,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:11:04,737 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-18 10:11:04,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:11:04,739 INFO L225 Difference]: With dead ends: 176 [2019-02-18 10:11:04,739 INFO L226 Difference]: Without dead ends: 172 [2019-02-18 10:11:04,740 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-02-18 10:11:04,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-02-18 10:11:04,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 125. [2019-02-18 10:11:04,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-02-18 10:11:04,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 788 transitions. [2019-02-18 10:11:04,764 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 788 transitions. Word has length 5 [2019-02-18 10:11:04,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:11:04,764 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 788 transitions. [2019-02-18 10:11:04,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:11:04,765 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 788 transitions. [2019-02-18 10:11:04,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:11:04,765 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:11:04,765 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:11:04,766 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:11:04,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:11:04,766 INFO L82 PathProgramCache]: Analyzing trace with hash 29588822, now seen corresponding path program 1 times [2019-02-18 10:11:04,766 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:11:04,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:11:04,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:11:04,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:11:04,767 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:11:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:11:04,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:04,913 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:11:04,914 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:11:04,914 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:11:04,914 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [32], [35] [2019-02-18 10:11:04,915 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:11:04,915 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:11:05,587 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:11:05,587 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. [2019-02-18 10:11:05,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:11:05,588 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:11:05,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:11:05,588 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 [2019-02-18 10:11:05,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:11:05,596 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:11:05,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:11:05,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:11:05,643 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,644 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 [2019-02-18 10:11:05,697 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,698 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,699 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 [2019-02-18 10:11:05,751 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,752 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,754 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,755 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,756 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 [2019-02-18 10:11:05,815 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,816 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,818 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,819 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,820 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,821 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,822 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-18 10:11:05,894 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,895 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,896 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,897 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,899 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,900 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,901 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,902 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,903 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 [2019-02-18 10:11:05,996 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,997 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,998 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,999 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:06,001 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:06,002 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:06,003 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:06,004 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:06,005 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:06,007 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:06,007 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 [2019-02-18 10:11:06,008 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:06,049 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:06,091 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:06,132 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:06,174 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:06,215 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:06,268 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 [2019-02-18 10:11:06,294 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-02-18 10:11:06,310 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2019-02-18 10:11:06,322 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 [2019-02-18 10:11:06,326 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 [2019-02-18 10:11:06,328 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 [2019-02-18 10:11:06,333 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-18 10:11:06,343 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 [2019-02-18 10:11:06,344 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:06,396 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:06,437 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:06,470 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:06,493 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:06,513 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:06,531 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:06,548 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:06,618 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. [2019-02-18 10:11:06,618 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-18 10:11:06,661 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:06,720 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 [2019-02-18 10:11:06,721 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-02-18 10:11:06,757 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-02-18 10:11:08,391 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. [2019-02-18 10:11:08,391 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:838 [2019-02-18 10:11:08,906 WARN L181 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 169 [2019-02-18 10:11:08,914 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:08,915 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:08,915 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:08,916 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:08,918 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:08,918 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:08,919 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 134 [2019-02-18 10:11:08,920 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:09,144 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,145 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,146 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,147 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,148 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,150 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,151 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,152 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,153 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,154 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 [2019-02-18 10:11:09,155 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:09,400 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,401 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,402 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,403 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,404 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,406 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,407 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,408 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,409 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,410 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 162 [2019-02-18 10:11:09,410 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:09,624 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. [2019-02-18 10:11:09,625 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 18 variables, input treesize:341, output treesize:277 [2019-02-18 10:11:09,768 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,769 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 124 [2019-02-18 10:11:09,770 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:09,943 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,944 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,945 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,946 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,947 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,948 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,949 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,951 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,952 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,953 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,954 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,955 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,956 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,957 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,958 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,959 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,960 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:09,961 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 [2019-02-18 10:11:09,962 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:10,161 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:10,162 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:10,163 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:10,164 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:10,166 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:10,167 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:10,168 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:10,169 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:10,170 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:10,171 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:10,172 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:10,173 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:10,174 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:10,175 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:10,176 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:10,177 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:10,178 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 173 [2019-02-18 10:11:10,179 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:10,365 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. [2019-02-18 10:11:10,365 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:307, output treesize:237 [2019-02-18 10:11:10,720 WARN L181 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2019-02-18 10:11:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:10,723 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:11:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:10,765 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:11:10,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2019-02-18 10:11:10,765 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:11:10,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:11:10,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:11:10,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-02-18 10:11:10,766 INFO L87 Difference]: Start difference. First operand 125 states and 788 transitions. Second operand 10 states. [2019-02-18 10:11:19,139 WARN L181 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 69 [2019-02-18 10:11:26,577 WARN L181 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 147 [2019-02-18 10:11:29,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:11:29,016 INFO L93 Difference]: Finished difference Result 235 states and 1248 transitions. [2019-02-18 10:11:29,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-02-18 10:11:29,017 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-18 10:11:29,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:11:29,019 INFO L225 Difference]: With dead ends: 235 [2019-02-18 10:11:29,019 INFO L226 Difference]: Without dead ends: 230 [2019-02-18 10:11:29,019 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-02-18 10:11:29,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-02-18 10:11:29,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 145. [2019-02-18 10:11:29,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-02-18 10:11:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 973 transitions. [2019-02-18 10:11:29,068 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 973 transitions. Word has length 5 [2019-02-18 10:11:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:11:29,068 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 973 transitions. [2019-02-18 10:11:29,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:11:29,069 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 973 transitions. [2019-02-18 10:11:29,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:11:29,069 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:11:29,069 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:11:29,070 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:11:29,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:11:29,070 INFO L82 PathProgramCache]: Analyzing trace with hash 29589382, now seen corresponding path program 1 times [2019-02-18 10:11:29,070 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:11:29,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:11:29,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:11:29,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:11:29,073 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:11:29,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:11:29,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:29,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:11:29,203 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:11:29,203 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:11:29,203 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [36], [37] [2019-02-18 10:11:29,204 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:11:29,204 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:11:29,769 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:11:29,769 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. [2019-02-18 10:11:29,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:11:29,770 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:11:29,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:11:29,770 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 [2019-02-18 10:11:29,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:11:29,777 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:11:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:11:29,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:11:29,817 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:29,818 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 [2019-02-18 10:11:29,872 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:29,874 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:29,874 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 [2019-02-18 10:11:29,925 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:29,926 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:29,927 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:29,929 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:29,929 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-18 10:11:29,989 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:29,990 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:29,990 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:29,991 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:29,993 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:29,994 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:29,995 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 [2019-02-18 10:11:30,067 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:30,068 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:30,068 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:30,069 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:30,070 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:30,072 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:30,073 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:30,074 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:30,075 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 [2019-02-18 10:11:30,167 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:30,169 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:30,170 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:30,171 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:30,172 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:30,173 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:30,175 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:30,176 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:30,177 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:30,178 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:30,179 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 [2019-02-18 10:11:30,180 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:30,220 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:30,262 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:30,305 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:30,347 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:30,388 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:30,444 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 [2019-02-18 10:11:30,447 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 [2019-02-18 10:11:30,449 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 [2019-02-18 10:11:30,452 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 [2019-02-18 10:11:30,456 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 [2019-02-18 10:11:30,461 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 [2019-02-18 10:11:30,465 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-18 10:11:30,478 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 [2019-02-18 10:11:30,479 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:30,533 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:30,576 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:30,609 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:30,632 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:30,654 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:30,672 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:30,688 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:30,761 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. [2019-02-18 10:11:30,761 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-18 10:11:30,978 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:30,978 INFO L303 Elim1Store]: Index analysis took 190 ms [2019-02-18 10:11:31,037 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 [2019-02-18 10:11:31,037 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-02-18 10:11:31,063 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-02-18 10:11:32,661 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. [2019-02-18 10:11:32,661 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:836 [2019-02-18 10:11:33,061 WARN L181 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 164 [2019-02-18 10:11:33,069 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,070 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,071 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,072 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,073 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,074 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,075 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,076 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,077 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,078 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 166 [2019-02-18 10:11:33,079 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:33,325 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,326 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,327 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,328 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,329 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,330 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,331 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,332 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,333 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:33,334 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 158 [2019-02-18 10:11:33,335 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:33,562 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,563 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,564 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,565 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,566 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,568 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,569 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,570 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,571 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:33,572 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 [2019-02-18 10:11:33,572 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:33,783 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. [2019-02-18 10:11:33,783 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:333, output treesize:277 [2019-02-18 10:12:27,780 WARN L181 SmtUtils]: Spent 52.87 s on a formula simplification that was a NOOP. DAG size: 158 [2019-02-18 10:12:27,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:27,787 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:12:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:27,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:12:27,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-18 10:12:27,844 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:12:27,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:12:27,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:12:27,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-02-18 10:12:27,845 INFO L87 Difference]: Start difference. First operand 145 states and 973 transitions. Second operand 8 states. [2019-02-18 10:13:27,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 10:13:27,843 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 529373 column 7: Overflow encountered when expanding vector at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1420) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:221) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.DiffWrapperScript.push(DiffWrapperScript.java:93) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.push(WrapperScript.java:101) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.UndoableWrapperScript.push(UndoableWrapperScript.java:52) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:621) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:191) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:152) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1066) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:968) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:188) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:699) 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-02-18 10:13:27,857 INFO L168 Benchmark]: Toolchain (without parser) took 283293.94 ms. Allocated memory was 137.9 MB in the beginning and 564.7 MB in the end (delta: 426.8 MB). Free memory was 105.4 MB in the beginning and 530.0 MB in the end (delta: -424.5 MB). Peak memory consumption was 493.8 MB. Max. memory is 7.1 GB. [2019-02-18 10:13:27,857 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory is still 106.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-02-18 10:13:27,857 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.28 ms. Allocated memory is still 137.9 MB. Free memory was 105.2 MB in the beginning and 102.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-02-18 10:13:27,858 INFO L168 Benchmark]: Boogie Preprocessor took 29.59 ms. Allocated memory is still 137.9 MB. Free memory was 102.8 MB in the beginning and 101.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-02-18 10:13:27,858 INFO L168 Benchmark]: RCFGBuilder took 662.42 ms. Allocated memory is still 137.9 MB. Free memory was 101.6 MB in the beginning and 88.6 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2019-02-18 10:13:27,858 INFO L168 Benchmark]: TraceAbstraction took 282538.69 ms. Allocated memory was 137.9 MB in the beginning and 564.7 MB in the end (delta: 426.8 MB). Free memory was 88.4 MB in the beginning and 530.0 MB in the end (delta: -441.6 MB). Peak memory consumption was 476.7 MB. Max. memory is 7.1 GB. [2019-02-18 10:13:27,860 INFO L336 ainManager$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 137.9 MB. Free memory is still 106.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 59.28 ms. Allocated memory is still 137.9 MB. Free memory was 105.2 MB in the beginning and 102.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.59 ms. Allocated memory is still 137.9 MB. Free memory was 102.8 MB in the beginning and 101.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 662.42 ms. Allocated memory is still 137.9 MB. Free memory was 101.6 MB in the beginning and 88.6 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 282538.69 ms. Allocated memory was 137.9 MB in the beginning and 564.7 MB in the end (delta: 426.8 MB). Free memory was 88.4 MB in the beginning and 530.0 MB in the end (delta: -441.6 MB). Peak memory consumption was 476.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: line 529373 column 7: Overflow encountered when expanding vector de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: line 529373 column 7: Overflow encountered when expanding vector: de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1420) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...