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-b7bd044-m [2019-01-18 18:09:49,215 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-18 18:09:49,217 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-18 18:09:49,229 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-18 18:09:49,230 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-18 18:09:49,231 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-18 18:09:49,232 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-18 18:09:49,234 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-18 18:09:49,236 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-18 18:09:49,237 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-18 18:09:49,238 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-01-18 18:09:49,272 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf [2019-01-18 18:09:49,294 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-18 18:09:49,294 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-18 18:09:49,295 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-18 18:09:49,295 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-18 18:09:49,295 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-18 18:09:49,296 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-18 18:09:49,297 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-18 18:09:49,297 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-18 18:09:49,297 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-18 18:09:49,297 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-01-18 18:09:49,297 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-01-18 18:09:49,298 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-18 18:09:49,298 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-18 18:09:49,299 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-18 18:09:49,299 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-18 18:09:49,299 INFO L133 SettingsManager]: * Use SBE=true [2019-01-18 18:09:49,300 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-18 18:09:49,301 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-18 18:09:49,302 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-18 18:09:49,302 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-18 18:09:49,302 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-18 18:09:49,302 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-18 18:09:49,302 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-18 18:09:49,302 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-18 18:09:49,303 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-18 18:09:49,303 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-18 18:09:49,303 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-18 18:09:49,304 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-18 18:09:49,304 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-18 18:09:49,304 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-18 18:09:49,304 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-18 18:09:49,304 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-18 18:09:49,305 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-18 18:09:49,305 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-18 18:09:49,305 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-18 18:09:49,305 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-18 18:09:49,305 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-18 18:09:49,306 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-18 18:09:49,306 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-18 18:09:49,341 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-18 18:09:49,353 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-18 18:09:49,358 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-18 18:09:49,359 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-18 18:09:49,360 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-18 18:09:49,361 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl [2019-01-18 18:09:49,361 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl' [2019-01-18 18:09:49,421 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-18 18:09:49,422 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-18 18:09:49,423 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-18 18:09:49,423 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-18 18:09:49,424 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-18 18:09:49,441 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 18.01 06:09:49" (1/1) ... [2019-01-18 18:09:49,455 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 18.01 06:09:49" (1/1) ... [2019-01-18 18:09:49,492 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-18 18:09:49,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-18 18:09:49,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-18 18:09:49,493 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-18 18:09:49,505 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 18.01 06:09:49" (1/1) ... [2019-01-18 18:09:49,505 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 18.01 06:09:49" (1/1) ... [2019-01-18 18:09:49,509 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 18.01 06:09:49" (1/1) ... [2019-01-18 18:09:49,510 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 18.01 06:09:49" (1/1) ... [2019-01-18 18:09:49,521 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 18.01 06:09:49" (1/1) ... [2019-01-18 18:09:49,527 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 18.01 06:09:49" (1/1) ... [2019-01-18 18:09:49,530 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 18.01 06:09:49" (1/1) ... [2019-01-18 18:09:49,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-18 18:09:49,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-18 18:09:49,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-18 18:09:49,538 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-18 18:09:49,539 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 18.01 06:09:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-18 18:09:49,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-18 18:09:49,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-18 18:09:49,944 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-18 18:09:49,945 INFO L286 CfgBuilder]: Removed 19 assue(true) statements. [2019-01-18 18:09:49,946 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:09:49 BoogieIcfgContainer [2019-01-18 18:09:49,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-18 18:09:49,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-18 18:09:49,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-18 18:09:49,951 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-18 18:09:49,952 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 18.01 06:09:49" (1/2) ... [2019-01-18 18:09:49,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@450dc538 and model type speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 06:09:49, skipping insertion in model container [2019-01-18 18:09:49,953 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 18.01 06:09:49" (2/2) ... [2019-01-18 18:09:49,955 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-8-unlimited.bpl [2019-01-18 18:09:49,966 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-18 18:09:49,985 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-01-18 18:09:50,023 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-01-18 18:09:50,065 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-18 18:09:50,066 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-18 18:09:50,066 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-18 18:09:50,066 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-18 18:09:50,066 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-18 18:09:50,066 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-18 18:09:50,067 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-18 18:09:50,067 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-18 18:09:50,083 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-01-18 18:09:50,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-18 18:09:50,090 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:50,091 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-18 18:09:50,094 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:50,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:50,100 INFO L82 PathProgramCache]: Analyzing trace with hash 996, now seen corresponding path program 1 times [2019-01-18 18:09:50,103 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:50,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:50,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:50,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:50,157 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:50,348 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-18 18:09:50,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-18 18:09:50,349 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 18:09:50,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-18 18:09:50,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-18 18:09:50,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-18 18:09:50,366 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-01-18 18:09:50,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:50,623 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2019-01-18 18:09:50,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-18 18:09:50,625 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-18 18:09:50,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:50,638 INFO L225 Difference]: With dead ends: 37 [2019-01-18 18:09:50,639 INFO L226 Difference]: Without dead ends: 32 [2019-01-18 18:09:50,642 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-18 18:09:50,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-01-18 18:09:50,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 18. [2019-01-18 18:09:50,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-01-18 18:09:50,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 33 transitions. [2019-01-18 18:09:50,679 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 33 transitions. Word has length 2 [2019-01-18 18:09:50,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:50,680 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 33 transitions. [2019-01-18 18:09:50,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-18 18:09:50,681 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 33 transitions. [2019-01-18 18:09:50,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 18:09:50,681 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:50,682 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 18:09:50,682 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:50,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:50,685 INFO L82 PathProgramCache]: Analyzing trace with hash 30818, now seen corresponding path program 1 times [2019-01-18 18:09:50,685 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:50,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:50,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:50,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:50,689 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:50,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:50,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:50,890 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:50,891 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 18:09:50,893 INFO L207 CegarAbsIntRunner]: [0], [32], [35] [2019-01-18 18:09:50,952 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:09:50,952 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:09:55,473 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:09:55,475 INFO L272 AbstractInterpreter]: Visited 3 different actions 11 times. Merged at 1 different actions 4 times. Widened at 1 different actions 1 times. Found 5 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 18:09:55,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:55,482 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:09:55,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:55,482 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:09:55,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:55,498 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:55,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:55,820 WARN L181 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-18 18:09:55,850 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:09:55,868 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:09:55,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:55,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:55,936 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 18:09:55,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:55,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,016 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:09:56,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,095 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:09:56,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,182 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 18:09:56,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,328 INFO L303 Elim1Store]: Index analysis took 140 ms [2019-01-18 18:09:56,330 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 18:09:56,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:56,429 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-18 18:09:56,431 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:56,799 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:57,185 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:57,232 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:57,283 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:57,311 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:57,331 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:57,353 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:57,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:57,417 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-18 18:09:57,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:57,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:57,490 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 [2019-01-18 18:09:57,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:57,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:57,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:57,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:57,591 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-18 18:09:57,739 WARN L181 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-01-18 18:09:57,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:57,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:57,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:57,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:57,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:57,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:57,752 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-18 18:09:57,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:57,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:57,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:57,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:57,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:57,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:57,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:57,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:57,868 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-18 18:09:58,035 WARN L181 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-18 18:09:58,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,059 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-18 18:09:58,336 WARN L181 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-18 18:09:58,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:58,357 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-18 18:09:58,358 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:58,418 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:58,494 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:58,557 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:58,638 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:58,699 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:58,850 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:58,956 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:58,956 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:147, output treesize:153 [2019-01-18 18:09:59,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:09:59,017 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-18 18:09:59,018 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:59,208 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-18 18:09:59,208 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-18 18:09:59,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:59,238 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:59,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:59,332 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:59,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 18:09:59,332 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:59,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 18:09:59,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 18:09:59,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 18:09:59,334 INFO L87 Difference]: Start difference. First operand 18 states and 33 transitions. Second operand 6 states. [2019-01-18 18:10:10,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:10,611 INFO L93 Difference]: Finished difference Result 63 states and 92 transitions. [2019-01-18 18:10:10,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 18:10:10,612 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-18 18:10:10,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:10,614 INFO L225 Difference]: With dead ends: 63 [2019-01-18 18:10:10,615 INFO L226 Difference]: Without dead ends: 60 [2019-01-18 18:10:10,616 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 18:10:10,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-01-18 18:10:10,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 25. [2019-01-18 18:10:10,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-01-18 18:10:10,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 53 transitions. [2019-01-18 18:10:10,623 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 53 transitions. Word has length 3 [2019-01-18 18:10:10,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:10,623 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 53 transitions. [2019-01-18 18:10:10,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 18:10:10,623 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 53 transitions. [2019-01-18 18:10:10,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 18:10:10,624 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:10,624 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 18:10:10,624 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:10,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:10,625 INFO L82 PathProgramCache]: Analyzing trace with hash 30384, now seen corresponding path program 1 times [2019-01-18 18:10:10,625 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:10,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:10,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:10,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:10,626 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:10,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:10,719 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:10,719 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 18:10:10,720 INFO L207 CegarAbsIntRunner]: [0], [18], [35] [2019-01-18 18:10:10,722 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:10,722 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:10:11,071 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:10:11,071 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 18:10:11,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:11,072 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:10:11,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:11,072 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:11,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:11,090 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:11,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:11,235 WARN L181 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-18 18:10:11,242 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:10:11,253 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:10:11,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,259 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 18:10:11,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,275 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:10:11,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,288 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:10:11,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,413 INFO L303 Elim1Store]: Index analysis took 123 ms [2019-01-18 18:10:11,415 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 18:10:11,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,436 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 18:10:11,468 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 18:10:11,470 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:11,526 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:11,571 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:11,607 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:11,637 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:11,662 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:11,682 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:11,710 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:11,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,753 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 18:10:11,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,802 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 18:10:11,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,856 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 18:10:11,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,919 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 18:10:11,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:12,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:12,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:12,003 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 18:10:12,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:12,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:12,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:12,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:12,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:12,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:12,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:12,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:12,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:12,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:12,107 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 18:10:12,108 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:12,148 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:12,188 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:12,230 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:12,271 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:12,313 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:12,385 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:12,385 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-18 18:10:12,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:12,464 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-18 18:10:12,465 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:12,532 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:12,532 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-18 18:10:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:12,555 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:12,585 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:12,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 18:10:12,585 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:12,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 18:10:12,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 18:10:12,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 18:10:12,586 INFO L87 Difference]: Start difference. First operand 25 states and 53 transitions. Second operand 6 states. [2019-01-18 18:10:13,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:13,552 INFO L93 Difference]: Finished difference Result 62 states and 99 transitions. [2019-01-18 18:10:13,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 18:10:13,552 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-18 18:10:13,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:13,555 INFO L225 Difference]: With dead ends: 62 [2019-01-18 18:10:13,555 INFO L226 Difference]: Without dead ends: 60 [2019-01-18 18:10:13,556 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 18:10:13,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-01-18 18:10:13,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 26. [2019-01-18 18:10:13,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-18 18:10:13,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 61 transitions. [2019-01-18 18:10:13,565 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 61 transitions. Word has length 3 [2019-01-18 18:10:13,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:13,565 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 61 transitions. [2019-01-18 18:10:13,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 18:10:13,566 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 61 transitions. [2019-01-18 18:10:13,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 18:10:13,566 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:13,566 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 18:10:13,567 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:13,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:13,567 INFO L82 PathProgramCache]: Analyzing trace with hash 30944, now seen corresponding path program 1 times [2019-01-18 18:10:13,567 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:13,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:13,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:13,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:13,568 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:13,634 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-18 18:10:13,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-18 18:10:13,634 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 18:10:13,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-18 18:10:13,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-18 18:10:13,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-18 18:10:13,636 INFO L87 Difference]: Start difference. First operand 26 states and 61 transitions. Second operand 3 states. [2019-01-18 18:10:13,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:13,717 INFO L93 Difference]: Finished difference Result 31 states and 61 transitions. [2019-01-18 18:10:13,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-18 18:10:13,717 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-18 18:10:13,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:13,718 INFO L225 Difference]: With dead ends: 31 [2019-01-18 18:10:13,718 INFO L226 Difference]: Without dead ends: 30 [2019-01-18 18:10:13,719 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-18 18:10:13,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-01-18 18:10:13,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-01-18 18:10:13,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-18 18:10:13,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 60 transitions. [2019-01-18 18:10:13,725 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 60 transitions. Word has length 3 [2019-01-18 18:10:13,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:13,725 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 60 transitions. [2019-01-18 18:10:13,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-18 18:10:13,726 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 60 transitions. [2019-01-18 18:10:13,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 18:10:13,726 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:13,726 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 18:10:13,727 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:13,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:13,727 INFO L82 PathProgramCache]: Analyzing trace with hash 30012, now seen corresponding path program 1 times [2019-01-18 18:10:13,727 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:13,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:13,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:13,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:13,728 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:13,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:13,806 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:13,806 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 18:10:13,806 INFO L207 CegarAbsIntRunner]: [0], [6], [35] [2019-01-18 18:10:13,810 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:13,810 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:10:14,160 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:10:14,161 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 18:10:14,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:14,161 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:10:14,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:14,161 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:14,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:14,176 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:14,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:14,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,291 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 18:10:14,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,400 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 18:10:14,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,461 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 18:10:14,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,532 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 18:10:14,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,642 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 18:10:14,748 WARN L181 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-18 18:10:14,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:14,771 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 18:10:14,772 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:14,815 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:14,856 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:14,944 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:15,013 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:15,061 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:15,112 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:10:15,116 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:10:15,120 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 18:10:15,126 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:10:15,130 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:10:15,136 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 18:10:15,142 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 18:10:15,157 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 18:10:15,158 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:15,211 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:15,261 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:15,293 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:15,319 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:15,426 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:15,444 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:15,458 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:15,529 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:15,530 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 9 variables, input treesize:121, output treesize:125 [2019-01-18 18:10:15,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:15,611 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-18 18:10:15,612 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:15,703 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:15,703 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-18 18:10:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:15,726 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:15,765 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-18 18:10:15,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-18 18:10:15,765 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 18:10:15,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-18 18:10:15,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-18 18:10:15,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-18 18:10:15,766 INFO L87 Difference]: Start difference. First operand 26 states and 60 transitions. Second operand 4 states. [2019-01-18 18:10:15,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:15,837 INFO L93 Difference]: Finished difference Result 32 states and 98 transitions. [2019-01-18 18:10:15,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-18 18:10:15,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-18 18:10:15,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:15,839 INFO L225 Difference]: With dead ends: 32 [2019-01-18 18:10:15,839 INFO L226 Difference]: Without dead ends: 31 [2019-01-18 18:10:15,840 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-18 18:10:15,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-01-18 18:10:15,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-01-18 18:10:15,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-18 18:10:15,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 97 transitions. [2019-01-18 18:10:15,848 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 97 transitions. Word has length 3 [2019-01-18 18:10:15,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:15,849 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 97 transitions. [2019-01-18 18:10:15,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-18 18:10:15,849 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 97 transitions. [2019-01-18 18:10:15,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 18:10:15,849 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:15,849 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 18:10:15,850 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:15,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:15,850 INFO L82 PathProgramCache]: Analyzing trace with hash 30136, now seen corresponding path program 1 times [2019-01-18 18:10:15,850 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:15,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:15,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:15,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:15,851 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:15,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:15,928 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:15,928 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 18:10:15,929 INFO L207 CegarAbsIntRunner]: [0], [10], [35] [2019-01-18 18:10:15,931 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:15,932 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:10:16,231 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:10:16,232 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 18:10:16,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:16,232 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:10:16,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:16,232 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:16,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:16,249 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:16,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:16,378 WARN L181 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-18 18:10:16,382 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:10:16,386 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:10:16,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,394 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 18:10:16,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,404 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:10:16,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,416 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:10:16,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,432 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 18:10:16,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,444 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 18:10:16,467 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 18:10:16,469 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:16,529 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:16,575 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:16,613 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:16,642 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:16,665 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:16,686 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:16,705 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:16,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,754 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 18:10:16,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,806 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 18:10:16,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,869 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 18:10:16,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:16,941 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 18:10:17,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,059 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 18:10:17,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,165 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 18:10:17,166 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:17,205 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:17,244 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:17,285 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:17,327 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:17,365 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:17,436 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:17,437 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-18 18:10:17,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:17,481 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-18 18:10:17,482 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:17,553 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:17,554 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-18 18:10:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:17,571 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:17,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:17,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 18:10:17,600 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:17,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 18:10:17,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 18:10:17,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 18:10:17,601 INFO L87 Difference]: Start difference. First operand 30 states and 97 transitions. Second operand 6 states. [2019-01-18 18:10:18,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:18,517 INFO L93 Difference]: Finished difference Result 65 states and 143 transitions. [2019-01-18 18:10:18,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 18:10:18,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-18 18:10:18,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:18,519 INFO L225 Difference]: With dead ends: 65 [2019-01-18 18:10:18,519 INFO L226 Difference]: Without dead ends: 64 [2019-01-18 18:10:18,519 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 18:10:18,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-01-18 18:10:18,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2019-01-18 18:10:18,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-01-18 18:10:18,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 115 transitions. [2019-01-18 18:10:18,528 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 115 transitions. Word has length 3 [2019-01-18 18:10:18,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:18,528 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 115 transitions. [2019-01-18 18:10:18,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 18:10:18,528 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 115 transitions. [2019-01-18 18:10:18,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 18:10:18,529 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:18,529 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 18:10:18,529 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:18,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:18,530 INFO L82 PathProgramCache]: Analyzing trace with hash 30632, now seen corresponding path program 1 times [2019-01-18 18:10:18,530 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:18,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:18,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:18,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:18,531 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:18,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:18,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:18,643 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:18,643 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 18:10:18,644 INFO L207 CegarAbsIntRunner]: [0], [26], [35] [2019-01-18 18:10:18,645 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:18,645 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:10:18,938 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:10:18,939 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 18:10:18,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:18,939 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:10:18,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:18,940 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:18,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:18,958 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:18,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:18,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:18,992 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:10:18,995 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:10:19,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,004 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 18:10:19,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,016 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:10:19,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,031 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:10:19,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,052 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 18:10:19,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,066 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 18:10:19,234 INFO L303 Elim1Store]: Index analysis took 165 ms [2019-01-18 18:10:19,236 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 18:10:19,237 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:19,492 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:19,534 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:19,569 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:19,599 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:19,629 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:19,647 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:19,666 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:19,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,720 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 18:10:19,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,775 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 18:10:19,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,853 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 18:10:19,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:19,946 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 18:10:20,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,053 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 18:10:20,162 WARN L181 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-18 18:10:20,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,178 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 18:10:20,179 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:20,228 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:20,266 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:20,305 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:20,345 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:20,386 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:20,458 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:20,459 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-18 18:10:20,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:20,530 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-18 18:10:20,531 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:20,605 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:20,606 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-18 18:10:20,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:20,624 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:20,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:20,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 18:10:20,654 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:20,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 18:10:20,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 18:10:20,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 18:10:20,654 INFO L87 Difference]: Start difference. First operand 32 states and 115 transitions. Second operand 6 states. [2019-01-18 18:10:21,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:21,388 INFO L93 Difference]: Finished difference Result 67 states and 161 transitions. [2019-01-18 18:10:21,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 18:10:21,388 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-18 18:10:21,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:21,390 INFO L225 Difference]: With dead ends: 67 [2019-01-18 18:10:21,390 INFO L226 Difference]: Without dead ends: 65 [2019-01-18 18:10:21,391 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 18:10:21,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-01-18 18:10:21,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2019-01-18 18:10:21,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-01-18 18:10:21,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 132 transitions. [2019-01-18 18:10:21,399 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 132 transitions. Word has length 3 [2019-01-18 18:10:21,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:21,399 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 132 transitions. [2019-01-18 18:10:21,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 18:10:21,399 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 132 transitions. [2019-01-18 18:10:21,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:10:21,400 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:21,400 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:10:21,400 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:21,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:21,401 INFO L82 PathProgramCache]: Analyzing trace with hash 954866, now seen corresponding path program 1 times [2019-01-18 18:10:21,401 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:21,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:21,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:21,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:21,402 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:21,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:21,508 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:21,508 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:10:21,508 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [35] [2019-01-18 18:10:21,510 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:21,510 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:10:22,405 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:10:22,405 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:10:22,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:22,406 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:10:22,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:22,406 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:22,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:22,421 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:22,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:22,635 WARN L181 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-18 18:10:22,637 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:10:22,643 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:10:22,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,652 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 18:10:22,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,660 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:10:22,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,668 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:10:22,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,704 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 18:10:22,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,728 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 18:10:22,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:22,837 INFO L303 Elim1Store]: Index analysis took 106 ms [2019-01-18 18:10:22,838 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-18 18:10:22,839 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:23,038 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:23,135 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:23,171 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:23,202 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:23,226 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:23,248 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:23,265 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:23,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,320 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-18 18:10:23,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,402 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-18 18:10:23,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,502 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-18 18:10:23,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,587 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-18 18:10:23,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-18 18:10:23,784 WARN L181 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-18 18:10:23,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,798 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-18 18:10:23,922 WARN L181 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-18 18:10:23,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:23,939 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-18 18:10:23,940 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:23,993 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:24,048 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:24,104 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:24,163 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:24,225 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:24,285 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:24,382 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:24,383 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-18 18:10:24,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:24,420 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 [2019-01-18 18:10:24,420 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:24,515 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:24,516 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-18 18:10:24,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:24,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:24,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:24,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:24,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:24,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:24,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:24,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:24,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:24,609 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:10:24,610 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-18 18:10:24,611 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:24,707 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:24,707 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-18 18:10:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:24,805 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:24,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:24,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:10:24,894 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:24,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:10:24,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:10:24,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:10:24,895 INFO L87 Difference]: Start difference. First operand 34 states and 132 transitions. Second operand 8 states. [2019-01-18 18:10:29,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:29,214 INFO L93 Difference]: Finished difference Result 82 states and 191 transitions. [2019-01-18 18:10:29,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 18:10:29,214 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 18:10:29,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:29,216 INFO L225 Difference]: With dead ends: 82 [2019-01-18 18:10:29,216 INFO L226 Difference]: Without dead ends: 80 [2019-01-18 18:10:29,217 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:10:29,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-01-18 18:10:29,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 36. [2019-01-18 18:10:29,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-01-18 18:10:29,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 128 transitions. [2019-01-18 18:10:29,225 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 128 transitions. Word has length 4 [2019-01-18 18:10:29,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:29,225 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 128 transitions. [2019-01-18 18:10:29,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:10:29,225 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 128 transitions. [2019-01-18 18:10:29,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:10:29,226 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:29,226 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:10:29,226 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:29,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:29,227 INFO L82 PathProgramCache]: Analyzing trace with hash 955426, now seen corresponding path program 1 times [2019-01-18 18:10:29,227 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:29,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:29,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:29,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:29,228 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:29,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:29,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:29,331 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:29,332 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:10:29,332 INFO L207 CegarAbsIntRunner]: [0], [32], [36], [37] [2019-01-18 18:10:29,334 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:29,334 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:10:31,034 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:10:31,034 INFO L272 AbstractInterpreter]: Visited 4 different actions 12 times. Merged at 1 different actions 4 times. Widened at 1 different actions 1 times. Found 5 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 18:10:31,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:31,035 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:10:31,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:31,035 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:31,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:31,043 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:31,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:31,067 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-18 18:10:31,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,101 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-18 18:10:31,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,165 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-18 18:10:31,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,236 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-18 18:10:31,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,324 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-18 18:10:31,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:31,429 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-18 18:10:31,430 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:31,482 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:31,539 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:31,595 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:31,652 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:31,710 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:31,831 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:10:31,836 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-18 18:10:31,841 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-18 18:10:31,846 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-18 18:10:31,852 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-18 18:10:31,857 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-18 18:10:31,864 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-18 18:10:31,876 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-18 18:10:31,877 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:31,928 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:31,967 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:31,996 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:32,017 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:32,034 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:32,050 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:32,072 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:32,139 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:32,140 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-18 18:10:32,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:32,867 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 149 [2019-01-18 18:10:32,868 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-18 18:10:32,920 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-18 18:10:34,836 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 54 dim-0 vars, and 9 xjuncts. [2019-01-18 18:10:34,837 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:131, output treesize:853 [2019-01-18 18:10:46,136 WARN L181 SmtUtils]: Spent 9.96 s on a formula simplification. DAG size of input: 472 DAG size of output: 98 [2019-01-18 18:10:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:46,142 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:46,165 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-18 18:10:46,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-18 18:10:46,165 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 18:10:46,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-18 18:10:46,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-18 18:10:46,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-18 18:10:46,166 INFO L87 Difference]: Start difference. First operand 36 states and 128 transitions. Second operand 4 states. [2019-01-18 18:10:46,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:46,221 INFO L93 Difference]: Finished difference Result 40 states and 140 transitions. [2019-01-18 18:10:46,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-18 18:10:46,222 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-18 18:10:46,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:46,223 INFO L225 Difference]: With dead ends: 40 [2019-01-18 18:10:46,223 INFO L226 Difference]: Without dead ends: 39 [2019-01-18 18:10:46,224 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-18 18:10:46,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-01-18 18:10:46,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-01-18 18:10:46,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-01-18 18:10:46,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 138 transitions. [2019-01-18 18:10:46,232 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 138 transitions. Word has length 4 [2019-01-18 18:10:46,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:46,233 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 138 transitions. [2019-01-18 18:10:46,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-18 18:10:46,233 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 138 transitions. [2019-01-18 18:10:46,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:10:46,234 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:46,234 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:10:46,234 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:46,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:46,234 INFO L82 PathProgramCache]: Analyzing trace with hash 954990, now seen corresponding path program 1 times [2019-01-18 18:10:46,234 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:46,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:46,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:46,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:46,236 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:46,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:46,430 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:46,430 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:10:46,430 INFO L207 CegarAbsIntRunner]: [0], [22], [32], [35] [2019-01-18 18:10:46,431 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:46,431 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:10:47,018 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:10:47,018 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:10:47,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:47,019 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:10:47,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:47,019 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:47,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:47,034 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:47,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:47,183 WARN L181 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-18 18:10:47,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,187 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-18 18:10:47,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,269 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-18 18:10:47,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,332 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-18 18:10:47,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,414 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-18 18:10:47,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,513 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-18 18:10:47,616 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-18 18:10:47,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,641 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-18 18:10:47,777 WARN L181 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-18 18:10:47,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:47,801 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-18 18:10:47,801 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:47,864 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:47,929 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:47,997 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,072 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,150 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,225 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,307 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:10:48,311 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:10:48,314 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 18:10:48,317 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:10:48,323 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:10:48,328 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 18:10:48,341 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 18:10:48,348 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-18 18:10:48,349 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,432 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,487 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,520 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,544 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,564 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,582 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,597 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,694 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:48,695 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-18 18:10:48,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,739 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-18 18:10:48,740 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,833 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:48,833 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-18 18:10:48,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:48,872 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2019-01-18 18:10:48,873 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,993 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:48,994 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-01-18 18:10:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:49,087 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:49,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:49,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:10:49,128 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:49,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:10:49,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:10:49,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:10:49,129 INFO L87 Difference]: Start difference. First operand 38 states and 138 transitions. Second operand 8 states. [2019-01-18 18:10:53,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:53,075 INFO L93 Difference]: Finished difference Result 84 states and 220 transitions. [2019-01-18 18:10:53,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 18:10:53,076 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 18:10:53,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:53,077 INFO L225 Difference]: With dead ends: 84 [2019-01-18 18:10:53,077 INFO L226 Difference]: Without dead ends: 82 [2019-01-18 18:10:53,078 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:10:53,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-01-18 18:10:53,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 43. [2019-01-18 18:10:53,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-18 18:10:53,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-01-18 18:10:53,091 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-01-18 18:10:53,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:53,091 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-01-18 18:10:53,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:10:53,091 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-01-18 18:10:53,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:10:53,092 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:53,092 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:10:53,093 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:53,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:53,093 INFO L82 PathProgramCache]: Analyzing trace with hash 954618, now seen corresponding path program 1 times [2019-01-18 18:10:53,093 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:53,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:53,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:53,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:53,094 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:53,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:53,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:53,167 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:53,168 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:10:53,168 INFO L207 CegarAbsIntRunner]: [0], [10], [32], [35] [2019-01-18 18:10:53,169 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:53,169 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:10:53,758 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:10:53,758 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:10:53,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:53,758 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:10:53,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:53,758 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:10:53,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:53,767 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:53,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:53,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,821 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-18 18:10:53,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,895 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-18 18:10:53,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:53,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-18 18:10:54,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,041 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-18 18:10:54,171 WARN L181 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-18 18:10:54,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,183 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-18 18:10:54,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,299 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-18 18:10:54,426 WARN L181 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-18 18:10:54,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:54,443 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-18 18:10:54,444 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:54,503 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:54,564 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:54,624 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:54,687 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:54,751 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:54,814 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:54,904 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:10:54,908 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:10:54,911 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 18:10:54,915 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:10:54,919 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:10:54,922 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 18:10:54,926 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 18:10:54,932 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-18 18:10:54,932 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:55,004 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:55,047 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:55,079 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:55,103 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:55,125 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:55,143 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:55,160 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:55,252 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:55,253 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-18 18:10:55,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,288 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-18 18:10:55,288 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:55,380 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:55,381 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-18 18:10:55,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:55,455 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:10:55,456 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2019-01-18 18:10:55,457 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:55,558 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:55,558 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-18 18:10:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:55,585 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:55,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:55,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:10:55,630 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:55,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:10:55,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:10:55,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:10:55,631 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-01-18 18:10:59,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:59,332 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-01-18 18:10:59,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 18:10:59,332 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 18:10:59,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:59,334 INFO L225 Difference]: With dead ends: 81 [2019-01-18 18:10:59,334 INFO L226 Difference]: Without dead ends: 80 [2019-01-18 18:10:59,335 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:10:59,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-01-18 18:10:59,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 43. [2019-01-18 18:10:59,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-18 18:10:59,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-01-18 18:10:59,345 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-01-18 18:10:59,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:59,345 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-01-18 18:10:59,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:10:59,346 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-01-18 18:10:59,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:10:59,346 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:59,346 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:10:59,346 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:59,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:59,347 INFO L82 PathProgramCache]: Analyzing trace with hash 955114, now seen corresponding path program 1 times [2019-01-18 18:10:59,347 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:59,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:59,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:59,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:59,348 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:59,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:59,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:59,576 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:59,576 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:10:59,577 INFO L207 CegarAbsIntRunner]: [0], [26], [32], [35] [2019-01-18 18:10:59,577 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:59,577 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:00,256 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:00,256 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:11:00,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:00,257 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:00,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:00,257 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:00,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:00,286 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:00,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:00,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,357 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-18 18:11:00,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,419 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-18 18:11:00,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,486 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-18 18:11:00,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,569 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-18 18:11:00,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,676 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-18 18:11:00,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,829 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-18 18:11:00,954 WARN L181 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-18 18:11:00,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:00,980 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-18 18:11:00,981 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:01,043 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:01,109 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:01,182 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:01,257 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:01,329 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:01,403 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:01,496 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:11:01,499 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:11:01,503 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 18:11:01,507 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:11:01,511 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:11:01,515 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 18:11:01,519 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 18:11:01,525 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-18 18:11:01,526 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:01,598 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:01,638 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:01,672 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:01,699 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:01,718 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:01,737 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:01,754 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:01,852 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:01,853 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-18 18:11:01,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:01,888 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-18 18:11:01,889 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:01,995 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:01,995 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-18 18:11:02,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:02,036 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:02,037 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2019-01-18 18:11:02,038 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:02,136 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:02,137 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-18 18:11:02,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:02,288 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:02,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:02,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:11:02,330 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:02,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:11:02,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:11:02,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:11:02,331 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-01-18 18:11:03,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:03,859 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-01-18 18:11:03,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 18:11:03,861 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 18:11:03,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:03,862 INFO L225 Difference]: With dead ends: 81 [2019-01-18 18:11:03,863 INFO L226 Difference]: Without dead ends: 79 [2019-01-18 18:11:03,863 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:11:03,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-01-18 18:11:03,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 44. [2019-01-18 18:11:03,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-01-18 18:11:03,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 175 transitions. [2019-01-18 18:11:03,873 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 175 transitions. Word has length 4 [2019-01-18 18:11:03,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:03,873 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 175 transitions. [2019-01-18 18:11:03,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:11:03,873 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 175 transitions. [2019-01-18 18:11:03,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:11:03,874 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:03,874 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:11:03,875 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:03,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:03,875 INFO L82 PathProgramCache]: Analyzing trace with hash 954742, now seen corresponding path program 1 times [2019-01-18 18:11:03,875 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:03,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:03,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:03,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:03,876 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:04,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:04,075 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:04,075 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:11:04,075 INFO L207 CegarAbsIntRunner]: [0], [14], [32], [35] [2019-01-18 18:11:04,077 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:04,077 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:04,869 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:04,869 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:11:04,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:04,869 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:04,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:04,870 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:04,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:04,882 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:04,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:04,951 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:11:04,954 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:11:04,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,964 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 18:11:04,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,974 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:11:04,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,986 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:11:04,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:04,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,002 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 [2019-01-18 18:11:05,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,016 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 18:11:05,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,031 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-18 18:11:05,032 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:05,116 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:05,164 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:05,201 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:05,232 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:05,254 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:05,272 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:05,292 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:05,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,345 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-18 18:11:05,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,403 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-18 18:11:05,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,467 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-18 18:11:05,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,538 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-18 18:11:05,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:05,628 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-18 18:11:06,695 WARN L181 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-18 18:11:06,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:06,926 INFO L303 Elim1Store]: Index analysis took 228 ms [2019-01-18 18:11:06,927 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-18 18:11:08,281 WARN L181 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-18 18:11:08,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:08,566 INFO L303 Elim1Store]: Index analysis took 281 ms [2019-01-18 18:11:08,566 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-18 18:11:08,567 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:08,747 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:08,809 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:08,867 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:08,926 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:08,987 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:09,047 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:09,142 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:09,143 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-18 18:11:09,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,178 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-18 18:11:09,179 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:09,273 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:09,273 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-18 18:11:09,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:09,315 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2019-01-18 18:11:09,316 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:09,411 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:09,411 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-01-18 18:11:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:09,492 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:09,537 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:09,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 18:11:09,538 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:09,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:11:09,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:11:09,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-18 18:11:09,538 INFO L87 Difference]: Start difference. First operand 44 states and 175 transitions. Second operand 8 states. [2019-01-18 18:11:12,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:12,919 INFO L93 Difference]: Finished difference Result 99 states and 274 transitions. [2019-01-18 18:11:12,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 18:11:12,920 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 18:11:12,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:12,921 INFO L225 Difference]: With dead ends: 99 [2019-01-18 18:11:12,921 INFO L226 Difference]: Without dead ends: 95 [2019-01-18 18:11:12,922 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-18 18:11:12,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-01-18 18:11:12,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 52. [2019-01-18 18:11:12,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-01-18 18:11:12,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 210 transitions. [2019-01-18 18:11:12,932 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 210 transitions. Word has length 4 [2019-01-18 18:11:12,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:12,932 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 210 transitions. [2019-01-18 18:11:12,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:11:12,932 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 210 transitions. [2019-01-18 18:11:12,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:11:12,933 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:12,933 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:11:12,934 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:12,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:12,934 INFO L82 PathProgramCache]: Analyzing trace with hash 941536, now seen corresponding path program 1 times [2019-01-18 18:11:12,934 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:12,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:12,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:12,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:12,935 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:13,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:13,061 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:13,061 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:11:13,061 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [35] [2019-01-18 18:11:13,062 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:13,062 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:13,440 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:13,441 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:11:13,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:13,441 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:13,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:13,441 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:13,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:13,458 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:13,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:13,578 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:11:13,589 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:11:13,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,596 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 18:11:13,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,604 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:11:13,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,613 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:11:13,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,624 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 18:11:13,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,636 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 [2019-01-18 18:11:13,652 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 [2019-01-18 18:11:13,653 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:13,713 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:13,760 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:13,798 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:13,825 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:13,850 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:13,869 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:13,888 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:13,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,936 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 18:11:13,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:13,987 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 18:11:14,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,042 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 18:11:14,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,105 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 18:11:14,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,187 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 18:11:14,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,290 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 18:11:14,290 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:14,329 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:14,371 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:14,424 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:14,462 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:14,502 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:14,571 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:14,572 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-18 18:11:14,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,627 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-18 18:11:14,628 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:14,690 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:14,691 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-18 18:11:14,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:14,729 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 134 [2019-01-18 18:11:14,731 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:14,800 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:14,800 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-18 18:11:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:14,822 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:14,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:14,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:11:14,862 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:14,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:11:14,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:11:14,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:11:14,863 INFO L87 Difference]: Start difference. First operand 52 states and 210 transitions. Second operand 8 states. [2019-01-18 18:11:15,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:15,384 INFO L93 Difference]: Finished difference Result 101 states and 289 transitions. [2019-01-18 18:11:15,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 18:11:15,384 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 18:11:15,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:15,386 INFO L225 Difference]: With dead ends: 101 [2019-01-18 18:11:15,386 INFO L226 Difference]: Without dead ends: 99 [2019-01-18 18:11:15,387 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:11:15,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-18 18:11:15,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 59. [2019-01-18 18:11:15,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-01-18 18:11:15,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 243 transitions. [2019-01-18 18:11:15,401 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 243 transitions. Word has length 4 [2019-01-18 18:11:15,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:15,401 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 243 transitions. [2019-01-18 18:11:15,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:11:15,402 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 243 transitions. [2019-01-18 18:11:15,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:11:15,402 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:15,402 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:11:15,403 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:15,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:15,403 INFO L82 PathProgramCache]: Analyzing trace with hash 941164, now seen corresponding path program 1 times [2019-01-18 18:11:15,403 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:15,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:15,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:15,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:15,404 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:15,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:15,512 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:15,512 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:15,512 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:11:15,513 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [35] [2019-01-18 18:11:15,514 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:15,514 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:15,765 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:15,765 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:11:15,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:15,766 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:15,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:15,766 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:15,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:15,776 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:15,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:15,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,838 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 18:11:15,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,887 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 18:11:15,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:15,940 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 18:11:16,601 WARN L181 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2019-01-18 18:11:16,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:16,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:16,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:16,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:16,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:16,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:16,749 INFO L303 Elim1Store]: Index analysis took 146 ms [2019-01-18 18:11:16,750 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 18:11:17,568 WARN L181 SmtUtils]: Spent 816.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2019-01-18 18:11:17,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:17,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:17,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:17,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:17,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:17,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:17,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:17,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:17,749 INFO L303 Elim1Store]: Index analysis took 179 ms [2019-01-18 18:11:17,750 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 18:11:18,065 WARN L181 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-18 18:11:18,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:18,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:18,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:18,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:18,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:18,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:18,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:18,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:18,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:18,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:18,081 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 18:11:18,081 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:18,123 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:18,164 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:18,204 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:18,247 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:18,290 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:18,340 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:11:18,344 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:11:18,348 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 18:11:18,352 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:11:18,354 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:11:18,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 18:11:18,392 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 18:11:18,461 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 18:11:18,462 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:18,514 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:18,556 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:18,589 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:18,612 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:18,895 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:19,120 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:19,171 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:19,253 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:19,253 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-18 18:11:19,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,301 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-18 18:11:19,302 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:19,369 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:19,369 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-18 18:11:19,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:19,401 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:19,402 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-01-18 18:11:19,403 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:19,473 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:19,474 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-01-18 18:11:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:19,535 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:19,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:19,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:11:19,576 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:19,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:11:19,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:11:19,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:11:19,577 INFO L87 Difference]: Start difference. First operand 59 states and 243 transitions. Second operand 8 states. [2019-01-18 18:11:19,857 WARN L181 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2019-01-18 18:11:20,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:20,452 INFO L93 Difference]: Finished difference Result 99 states and 302 transitions. [2019-01-18 18:11:20,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 18:11:20,452 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 18:11:20,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:20,454 INFO L225 Difference]: With dead ends: 99 [2019-01-18 18:11:20,454 INFO L226 Difference]: Without dead ends: 98 [2019-01-18 18:11:20,455 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:11:20,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-01-18 18:11:20,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2019-01-18 18:11:20,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-01-18 18:11:20,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 261 transitions. [2019-01-18 18:11:20,467 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 261 transitions. Word has length 4 [2019-01-18 18:11:20,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:20,468 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 261 transitions. [2019-01-18 18:11:20,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:11:20,468 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 261 transitions. [2019-01-18 18:11:20,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:11:20,468 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:20,469 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:11:20,469 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:20,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:20,469 INFO L82 PathProgramCache]: Analyzing trace with hash 941660, now seen corresponding path program 1 times [2019-01-18 18:11:20,469 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:20,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:20,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:20,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:20,471 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:20,800 WARN L181 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-01-18 18:11:20,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:20,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:20,997 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:20,997 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:11:20,997 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [35] [2019-01-18 18:11:21,000 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:21,000 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:21,339 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:21,340 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:11:21,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:21,340 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:21,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:21,340 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:21,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:21,351 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:21,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:21,414 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:11:21,416 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:11:21,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,421 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 18:11:21,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,428 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:11:21,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,440 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:11:21,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,452 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 18:11:21,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,468 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 18:11:21,486 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 18:11:21,487 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:21,547 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:21,594 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:21,628 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:21,657 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:21,682 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:21,701 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:21,740 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:21,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,787 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 18:11:21,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,835 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 18:11:21,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 18:11:21,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:21,954 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 18:11:22,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 18:11:22,143 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-18 18:11:22,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,158 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 18:11:22,159 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:22,229 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:22,269 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:22,310 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:22,351 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:22,392 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:22,462 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:22,462 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-18 18:11:22,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,519 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-18 18:11:22,520 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:22,584 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:22,585 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-18 18:11:22,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:22,621 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:22,622 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-01-18 18:11:22,623 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:22,689 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:22,690 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-01-18 18:11:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:22,712 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:22,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:22,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:11:22,752 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:22,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:11:22,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:11:22,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:11:22,753 INFO L87 Difference]: Start difference. First operand 61 states and 261 transitions. Second operand 8 states. [2019-01-18 18:11:23,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:23,371 INFO L93 Difference]: Finished difference Result 101 states and 320 transitions. [2019-01-18 18:11:23,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 18:11:23,371 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 18:11:23,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:23,373 INFO L225 Difference]: With dead ends: 101 [2019-01-18 18:11:23,373 INFO L226 Difference]: Without dead ends: 99 [2019-01-18 18:11:23,374 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:11:23,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-18 18:11:23,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 62. [2019-01-18 18:11:23,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-01-18 18:11:23,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 278 transitions. [2019-01-18 18:11:23,389 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 278 transitions. Word has length 4 [2019-01-18 18:11:23,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:23,389 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 278 transitions. [2019-01-18 18:11:23,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:11:23,389 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 278 transitions. [2019-01-18 18:11:23,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:11:23,390 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:23,390 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:11:23,390 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:23,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:23,391 INFO L82 PathProgramCache]: Analyzing trace with hash 941288, now seen corresponding path program 1 times [2019-01-18 18:11:23,391 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:23,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:23,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:23,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:23,392 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:23,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:23,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:23,496 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:23,497 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:11:23,497 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [35] [2019-01-18 18:11:23,498 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:23,498 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:23,749 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:23,749 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:11:23,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:23,750 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:23,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:23,750 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:23,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:23,758 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:23,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:23,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:23,814 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 18:11:23,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:23,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:23,866 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 18:11:23,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:23,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:23,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:23,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:23,919 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 18:11:24,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,022 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 18:11:24,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,107 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 18:11:24,216 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-18 18:11:24,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,230 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 18:11:24,231 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:24,269 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:24,312 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:24,356 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:24,397 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:24,441 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:24,497 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:11:24,501 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:11:24,504 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 18:11:24,506 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:11:24,509 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:11:24,513 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 18:11:24,520 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 18:11:24,530 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 18:11:24,531 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:24,585 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:24,626 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:24,659 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:24,685 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:24,706 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:24,724 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:24,739 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:24,818 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:24,819 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-18 18:11:24,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,872 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-18 18:11:24,873 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:24,940 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:24,940 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-18 18:11:24,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:24,977 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-18 18:11:24,978 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:25,048 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:25,048 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-18 18:11:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:25,070 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:25,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:25,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:25,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:11:25,111 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:25,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:11:25,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:11:25,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:11:25,112 INFO L87 Difference]: Start difference. First operand 62 states and 278 transitions. Second operand 8 states. [2019-01-18 18:11:25,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:25,783 INFO L93 Difference]: Finished difference Result 106 states and 350 transitions. [2019-01-18 18:11:25,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 18:11:25,784 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 18:11:25,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:25,786 INFO L225 Difference]: With dead ends: 106 [2019-01-18 18:11:25,786 INFO L226 Difference]: Without dead ends: 104 [2019-01-18 18:11:25,786 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:11:25,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-01-18 18:11:25,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 65. [2019-01-18 18:11:25,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-01-18 18:11:25,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 304 transitions. [2019-01-18 18:11:25,799 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 304 transitions. Word has length 4 [2019-01-18 18:11:25,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:25,799 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 304 transitions. [2019-01-18 18:11:25,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:11:25,799 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 304 transitions. [2019-01-18 18:11:25,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:11:25,800 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:25,800 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:11:25,800 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:25,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:25,801 INFO L82 PathProgramCache]: Analyzing trace with hash 941784, now seen corresponding path program 1 times [2019-01-18 18:11:25,801 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:25,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:25,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:25,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:25,802 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:25,962 WARN L181 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-01-18 18:11:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:25,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:25,974 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:25,975 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:11:25,975 INFO L207 CegarAbsIntRunner]: [0], [18], [30], [35] [2019-01-18 18:11:25,976 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:25,976 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:26,300 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:26,301 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:11:26,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:26,301 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:26,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:26,301 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:26,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:26,309 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:26,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:26,370 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:11:26,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:11:26,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,377 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 18:11:26,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,385 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:11:26,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,393 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:11:26,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,406 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 18:11:26,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,421 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 18:11:26,435 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 18:11:26,436 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:26,496 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:26,546 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:26,584 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:26,618 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:26,641 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:26,662 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:26,681 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:26,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,727 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 18:11:26,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,777 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 18:11:26,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,830 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 18:11:26,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,894 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 18:11:26,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:26,976 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 18:11:27,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,091 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 18:11:27,092 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:27,128 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:27,167 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:27,206 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:27,247 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:27,287 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:27,358 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:27,358 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-18 18:11:27,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,422 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-18 18:11:27,422 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:27,484 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:27,484 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-18 18:11:27,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:27,522 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-18 18:11:27,523 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:27,589 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:27,590 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-18 18:11:27,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:27,621 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:27,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:27,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:11:27,663 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:27,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:11:27,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:11:27,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:11:27,664 INFO L87 Difference]: Start difference. First operand 65 states and 304 transitions. Second operand 8 states. [2019-01-18 18:11:28,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:28,354 INFO L93 Difference]: Finished difference Result 107 states and 376 transitions. [2019-01-18 18:11:28,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 18:11:28,355 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 18:11:28,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:28,356 INFO L225 Difference]: With dead ends: 107 [2019-01-18 18:11:28,356 INFO L226 Difference]: Without dead ends: 99 [2019-01-18 18:11:28,357 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:11:28,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-18 18:11:28,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2019-01-18 18:11:28,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-01-18 18:11:28,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 328 transitions. [2019-01-18 18:11:28,372 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 328 transitions. Word has length 4 [2019-01-18 18:11:28,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:28,372 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 328 transitions. [2019-01-18 18:11:28,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:11:28,372 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 328 transitions. [2019-01-18 18:11:28,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:11:28,373 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:28,373 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:11:28,374 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:28,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:28,374 INFO L82 PathProgramCache]: Analyzing trace with hash 930314, now seen corresponding path program 1 times [2019-01-18 18:11:28,374 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:28,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:28,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:28,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:28,375 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:28,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:28,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:28,483 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:28,483 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:11:28,483 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [35] [2019-01-18 18:11:28,486 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:28,486 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:29,057 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:29,058 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:11:29,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:29,058 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:29,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:29,058 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:29,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:29,066 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:29,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:29,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,113 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 18:11:29,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,166 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 18:11:29,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,217 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 18:11:29,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,285 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 18:11:29,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,367 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 18:11:29,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:29,466 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 18:11:29,467 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:29,508 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:29,550 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:29,592 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:29,636 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:29,680 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:29,734 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:11:29,738 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:11:29,741 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 18:11:29,743 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:11:29,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:11:29,749 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 18:11:29,776 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 [2019-01-18 18:11:29,826 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 18:11:29,827 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:29,892 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:29,977 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:30,185 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:30,210 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:30,231 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:30,249 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:30,265 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:30,337 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:30,338 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-18 18:11:30,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:30,382 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 135 [2019-01-18 18:11:30,383 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 18:11:30,624 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 12 dim-0 vars, and 2 xjuncts. [2019-01-18 18:11:30,624 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:201 [2019-01-18 18:11:30,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:30,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:30,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:30,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:30,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:30,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:30,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:30,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:30,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:30,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:30,763 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 25 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 12 case distinctions, treesize of input 111 treesize of output 165 [2019-01-18 18:11:30,764 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-01-18 18:11:30,784 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 64 xjuncts. [2019-01-18 18:11:31,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:31,856 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:31,857 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 126 [2019-01-18 18:11:31,858 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:32,279 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 2 dim-1 vars, End of recursive call: 49 dim-0 vars, and 8 xjuncts. [2019-01-18 18:11:32,280 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:218, output treesize:686 [2019-01-18 18:11:33,172 WARN L181 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 114 [2019-01-18 18:11:33,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:33,174 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:33,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:33,216 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:33,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2019-01-18 18:11:33,216 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:33,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:11:33,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:11:33,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-01-18 18:11:33,217 INFO L87 Difference]: Start difference. First operand 66 states and 328 transitions. Second operand 8 states. [2019-01-18 18:11:34,255 WARN L181 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 117 [2019-01-18 18:11:37,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:37,416 INFO L93 Difference]: Finished difference Result 155 states and 556 transitions. [2019-01-18 18:11:37,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-18 18:11:37,416 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 18:11:37,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:37,419 INFO L225 Difference]: With dead ends: 155 [2019-01-18 18:11:37,419 INFO L226 Difference]: Without dead ends: 152 [2019-01-18 18:11:37,419 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 [2019-01-18 18:11:37,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-01-18 18:11:37,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 78. [2019-01-18 18:11:37,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-01-18 18:11:37,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 438 transitions. [2019-01-18 18:11:37,438 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 438 transitions. Word has length 4 [2019-01-18 18:11:37,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:37,438 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 438 transitions. [2019-01-18 18:11:37,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:11:37,439 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 438 transitions. [2019-01-18 18:11:37,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:11:37,439 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:37,439 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:11:37,440 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:37,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:37,440 INFO L82 PathProgramCache]: Analyzing trace with hash 930440, now seen corresponding path program 1 times [2019-01-18 18:11:37,440 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:37,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:37,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:37,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:37,441 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:37,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:37,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:37,609 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:37,610 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:11:37,610 INFO L207 CegarAbsIntRunner]: [0], [6], [36], [37] [2019-01-18 18:11:37,611 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:37,611 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:37,779 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:37,779 INFO L272 AbstractInterpreter]: Visited 4 different actions 6 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 18:11:37,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:37,779 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:37,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:37,780 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:37,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:37,788 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:37,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:37,831 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:11:37,835 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:11:37,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:37,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:37,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 18:11:37,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:37,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:37,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:37,856 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:11:37,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:37,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:37,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:37,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:37,867 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:11:37,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:37,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:37,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:37,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:37,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:37,880 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 18:11:37,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:37,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:37,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:37,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:37,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:37,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:37,894 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 18:11:37,906 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 18:11:37,907 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:37,962 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:38,009 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:38,044 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:38,072 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:38,096 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:38,116 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:38,135 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:38,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,182 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 18:11:38,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,229 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 18:11:38,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,281 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 18:11:38,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,344 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 18:11:38,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 18:11:38,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,527 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 18:11:38,528 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:38,567 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:38,605 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:38,645 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:38,686 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:38,724 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:38,794 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:38,794 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-18 18:11:38,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:38,832 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-18 18:11:38,833 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:38,898 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:38,898 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-18 18:11:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:38,918 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:38,946 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:38,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 18:11:38,946 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:38,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 18:11:38,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 18:11:38,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 18:11:38,947 INFO L87 Difference]: Start difference. First operand 78 states and 438 transitions. Second operand 6 states. [2019-01-18 18:11:39,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:39,280 INFO L93 Difference]: Finished difference Result 104 states and 471 transitions. [2019-01-18 18:11:39,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 18:11:39,280 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-18 18:11:39,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:39,282 INFO L225 Difference]: With dead ends: 104 [2019-01-18 18:11:39,282 INFO L226 Difference]: Without dead ends: 103 [2019-01-18 18:11:39,283 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 18:11:39,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-01-18 18:11:39,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2019-01-18 18:11:39,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-01-18 18:11:39,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-01-18 18:11:39,296 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-01-18 18:11:39,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:39,297 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-01-18 18:11:39,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 18:11:39,297 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-01-18 18:11:39,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:11:39,297 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:39,297 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:11:39,297 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:39,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:39,298 INFO L82 PathProgramCache]: Analyzing trace with hash 945816, now seen corresponding path program 1 times [2019-01-18 18:11:39,298 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:39,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:39,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:39,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:39,299 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:39,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:39,359 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:39,359 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:11:39,359 INFO L207 CegarAbsIntRunner]: [0], [22], [36], [37] [2019-01-18 18:11:39,362 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:39,362 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:39,528 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:39,528 INFO L272 AbstractInterpreter]: Visited 4 different actions 6 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 18:11:39,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:39,528 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:39,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:39,528 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:39,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:39,537 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:39,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:39,549 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:11:39,557 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-18 18:11:39,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,570 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-18 18:11:39,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,585 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-18 18:11:39,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,599 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-18 18:11:39,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,616 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-18 18:11:39,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,633 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-18 18:11:39,646 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-18 18:11:39,647 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:39,702 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:39,747 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:39,780 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:39,809 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:39,831 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:39,849 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:39,868 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:39,908 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-18 18:11:39,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,932 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-18 18:11:39,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:39,983 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-18 18:11:40,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,046 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-18 18:11:40,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,127 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-18 18:11:40,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,222 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-18 18:11:40,223 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:40,260 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:40,297 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:40,335 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:40,374 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:40,416 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:40,485 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:40,485 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-18 18:11:40,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:40,519 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-18 18:11:40,520 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:40,584 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:40,584 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-18 18:11:40,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:40,603 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:40,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:40,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 18:11:40,638 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:40,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 18:11:40,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 18:11:40,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 18:11:40,639 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 6 states. [2019-01-18 18:11:41,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:41,069 INFO L93 Difference]: Finished difference Result 108 states and 483 transitions. [2019-01-18 18:11:41,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 18:11:41,069 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-18 18:11:41,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:41,071 INFO L225 Difference]: With dead ends: 108 [2019-01-18 18:11:41,071 INFO L226 Difference]: Without dead ends: 107 [2019-01-18 18:11:41,072 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 18:11:41,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-01-18 18:11:41,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2019-01-18 18:11:41,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-01-18 18:11:41,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-01-18 18:11:41,087 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-01-18 18:11:41,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:41,088 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-01-18 18:11:41,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 18:11:41,088 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-01-18 18:11:41,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:11:41,088 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:41,089 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:11:41,089 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:41,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:41,089 INFO L82 PathProgramCache]: Analyzing trace with hash 945008, now seen corresponding path program 1 times [2019-01-18 18:11:41,089 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:41,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:41,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:41,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:41,090 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:41,293 WARN L181 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2019-01-18 18:11:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:41,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:41,323 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:41,323 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:11:41,324 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [35] [2019-01-18 18:11:41,325 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:41,325 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:41,550 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:41,550 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:11:41,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:41,550 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:41,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:41,550 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:41,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:41,559 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:41,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:41,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,609 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 18:11:41,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,665 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 18:11:41,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,722 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 18:11:41,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,789 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 18:11:41,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,873 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 18:11:41,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:41,977 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 18:11:41,978 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:42,016 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:42,058 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:42,101 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:42,152 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:42,196 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:42,250 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:11:42,254 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:11:42,257 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 18:11:42,262 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:11:42,277 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:11:42,280 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 18:11:42,283 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 18:11:42,296 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 18:11:42,297 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:42,354 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:42,397 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:42,429 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:42,456 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:42,477 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:42,493 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:42,509 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:42,581 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:42,582 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-18 18:11:42,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:42,632 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-18 18:11:42,633 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:42,700 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:42,700 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-18 18:11:42,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:42,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:42,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:42,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:42,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:42,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:42,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:42,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:42,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:42,876 INFO L303 Elim1Store]: Index analysis took 147 ms [2019-01-18 18:11:42,877 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-18 18:11:42,877 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:42,946 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:42,946 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-18 18:11:42,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:42,971 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:43,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:43,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:43,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 18:11:43,021 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:43,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:11:43,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:11:43,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-01-18 18:11:43,022 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 8 states. [2019-01-18 18:11:44,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:44,101 INFO L93 Difference]: Finished difference Result 154 states and 652 transitions. [2019-01-18 18:11:44,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 18:11:44,104 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 18:11:44,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:44,105 INFO L225 Difference]: With dead ends: 154 [2019-01-18 18:11:44,106 INFO L226 Difference]: Without dead ends: 153 [2019-01-18 18:11:44,106 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:11:44,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-01-18 18:11:44,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 92. [2019-01-18 18:11:44,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-01-18 18:11:44,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 556 transitions. [2019-01-18 18:11:44,128 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 556 transitions. Word has length 4 [2019-01-18 18:11:44,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:44,128 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 556 transitions. [2019-01-18 18:11:44,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:11:44,128 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 556 transitions. [2019-01-18 18:11:44,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:11:44,129 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:44,129 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:11:44,129 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:44,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:44,130 INFO L82 PathProgramCache]: Analyzing trace with hash 945504, now seen corresponding path program 1 times [2019-01-18 18:11:44,130 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:44,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:44,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:44,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:44,131 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:44,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:44,263 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:44,263 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:11:44,264 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [35] [2019-01-18 18:11:44,265 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:44,265 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:44,530 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:44,531 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:11:44,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:44,531 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:44,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:44,531 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:44,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:44,539 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:44,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:44,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:44,588 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:11:44,591 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:11:44,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,600 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 18:11:44,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,612 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:11:44,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,620 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:11:44,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,631 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 18:11:44,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,645 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 18:11:44,658 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 18:11:44,658 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:44,719 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:44,764 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:44,802 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:44,829 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:44,854 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:44,874 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:44,889 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:44,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,933 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 18:11:44,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:44,979 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 18:11:45,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,033 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 18:11:45,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,099 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 18:11:45,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,180 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 18:11:45,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,283 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 18:11:45,284 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:45,322 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:45,362 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:45,401 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:45,442 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:45,482 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:45,553 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:45,554 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-18 18:11:45,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,598 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-18 18:11:45,599 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:45,662 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:45,663 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-18 18:11:45,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:45,697 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-18 18:11:45,698 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:45,777 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:45,777 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-18 18:11:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:45,801 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:45,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:45,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:45,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 18:11:45,852 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:45,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:11:45,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:11:45,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-18 18:11:45,853 INFO L87 Difference]: Start difference. First operand 92 states and 556 transitions. Second operand 8 states. [2019-01-18 18:11:46,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:46,825 INFO L93 Difference]: Finished difference Result 148 states and 688 transitions. [2019-01-18 18:11:46,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 18:11:46,826 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 18:11:46,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:46,828 INFO L225 Difference]: With dead ends: 148 [2019-01-18 18:11:46,828 INFO L226 Difference]: Without dead ends: 146 [2019-01-18 18:11:46,828 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 [2019-01-18 18:11:46,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-01-18 18:11:46,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2019-01-18 18:11:46,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-01-18 18:11:46,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 590 transitions. [2019-01-18 18:11:46,847 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 590 transitions. Word has length 4 [2019-01-18 18:11:46,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:46,847 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 590 transitions. [2019-01-18 18:11:46,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:11:46,847 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 590 transitions. [2019-01-18 18:11:46,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:11:46,848 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:46,848 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:11:46,848 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:46,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:46,848 INFO L82 PathProgramCache]: Analyzing trace with hash 933972, now seen corresponding path program 1 times [2019-01-18 18:11:46,848 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:46,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:46,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:46,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:46,849 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:47,118 WARN L181 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2019-01-18 18:11:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:47,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:47,140 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:47,141 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:11:47,141 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [35] [2019-01-18 18:11:47,142 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:47,142 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:47,383 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:47,384 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:11:47,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:47,384 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:47,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:47,384 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:47,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:47,392 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:47,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:47,433 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:11:47,438 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:11:47,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,444 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 [2019-01-18 18:11:47,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,454 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:11:47,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,479 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:11:47,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,491 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 18:11:47,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,506 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 18:11:47,523 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 18:11:47,524 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:47,583 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:47,628 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:47,665 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:47,694 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:47,719 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:47,739 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:47,758 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:47,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,804 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 18:11:47,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,850 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 18:11:47,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,902 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 18:11:47,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:47,968 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 [2019-01-18 18:11:48,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,049 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 18:11:48,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,153 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 18:11:48,153 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:48,189 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:48,229 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:48,268 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:48,308 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:48,349 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:48,419 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:48,420 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-18 18:11:48,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,472 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-18 18:11:48,473 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:48,538 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:48,539 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-18 18:11:48,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:48,569 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:48,570 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 141 [2019-01-18 18:11:48,570 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:48,639 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:48,639 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:82 [2019-01-18 18:11:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:48,658 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:48,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:48,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:11:48,700 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:48,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:11:48,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:11:48,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:11:48,700 INFO L87 Difference]: Start difference. First operand 103 states and 590 transitions. Second operand 8 states. [2019-01-18 18:11:49,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:49,172 INFO L93 Difference]: Finished difference Result 145 states and 646 transitions. [2019-01-18 18:11:49,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 18:11:49,174 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 18:11:49,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:49,176 INFO L225 Difference]: With dead ends: 145 [2019-01-18 18:11:49,176 INFO L226 Difference]: Without dead ends: 143 [2019-01-18 18:11:49,176 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:11:49,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-01-18 18:11:49,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2019-01-18 18:11:49,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-01-18 18:11:49,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 599 transitions. [2019-01-18 18:11:49,195 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 599 transitions. Word has length 4 [2019-01-18 18:11:49,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:49,196 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 599 transitions. [2019-01-18 18:11:49,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:11:49,196 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 599 transitions. [2019-01-18 18:11:49,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:11:49,197 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:49,197 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:11:49,197 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:49,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:49,197 INFO L82 PathProgramCache]: Analyzing trace with hash 938128, now seen corresponding path program 1 times [2019-01-18 18:11:49,197 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:49,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:49,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:49,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:49,198 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:49,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:49,262 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:49,262 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:11:49,262 INFO L207 CegarAbsIntRunner]: [0], [14], [36], [37] [2019-01-18 18:11:49,263 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:49,263 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:49,425 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:49,425 INFO L272 AbstractInterpreter]: Visited 4 different actions 6 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 18:11:49,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:49,425 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:49,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:49,426 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:49,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:49,434 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:49,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:49,460 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:11:49,467 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-18 18:11:49,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,476 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-18 18:11:49,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,491 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-18 18:11:49,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,507 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-18 18:11:49,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,522 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-18 18:11:49,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,534 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-18 18:11:49,547 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-18 18:11:49,548 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:49,608 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:49,650 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:49,683 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:49,709 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:49,729 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:49,749 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:49,768 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:49,805 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-18 18:11:49,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,830 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-18 18:11:49,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,880 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-18 18:11:49,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:49,942 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-18 18:11:50,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-18 18:11:50,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,120 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-18 18:11:50,121 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:50,157 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:50,194 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:50,232 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:50,279 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:50,320 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:50,389 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:50,390 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-18 18:11:50,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:50,427 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-18 18:11:50,428 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:50,487 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:50,488 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-18 18:11:50,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:50,534 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:50,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:50,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 18:11:50,564 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:50,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 18:11:50,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 18:11:50,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 18:11:50,564 INFO L87 Difference]: Start difference. First operand 104 states and 599 transitions. Second operand 6 states. [2019-01-18 18:11:51,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:51,039 INFO L93 Difference]: Finished difference Result 124 states and 613 transitions. [2019-01-18 18:11:51,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 18:11:51,040 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-18 18:11:51,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:51,041 INFO L225 Difference]: With dead ends: 124 [2019-01-18 18:11:51,042 INFO L226 Difference]: Without dead ends: 123 [2019-01-18 18:11:51,042 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 18:11:51,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-01-18 18:11:51,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2019-01-18 18:11:51,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-01-18 18:11:51,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 598 transitions. [2019-01-18 18:11:51,060 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 598 transitions. Word has length 4 [2019-01-18 18:11:51,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:51,061 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 598 transitions. [2019-01-18 18:11:51,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 18:11:51,061 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 598 transitions. [2019-01-18 18:11:51,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:11:51,061 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:51,062 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:11:51,062 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:51,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:51,062 INFO L82 PathProgramCache]: Analyzing trace with hash 937816, now seen corresponding path program 1 times [2019-01-18 18:11:51,062 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:51,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:51,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:51,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:51,063 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:51,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:51,187 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:51,187 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:11:51,187 INFO L207 CegarAbsIntRunner]: [0], [14], [26], [35] [2019-01-18 18:11:51,188 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:51,189 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:51,428 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:51,428 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:11:51,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:51,428 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:51,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:51,428 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:51,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:51,437 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:51,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:51,482 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:11:51,484 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:11:51,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,491 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 18:11:51,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,501 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:11:51,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,517 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:11:51,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,529 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 18:11:51,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,542 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 18:11:51,553 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 18:11:51,554 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:51,614 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:51,660 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:51,696 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:51,726 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:51,751 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:51,767 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:51,786 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:51,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,831 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 18:11:51,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,880 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 18:11:51,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,936 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 18:11:51,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:51,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,001 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 18:11:52,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,087 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 18:11:52,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,193 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 18:11:52,193 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:52,234 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:52,273 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:52,314 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:52,355 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:52,397 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:52,469 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:52,469 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-18 18:11:52,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,551 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-18 18:11:52,552 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:52,616 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:52,617 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-18 18:11:52,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:52,717 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-18 18:11:52,718 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:52,788 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:52,789 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-18 18:11:52,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:52,825 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:52,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:52,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 18:11:52,878 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:52,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:11:52,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:11:52,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-18 18:11:52,878 INFO L87 Difference]: Start difference. First operand 104 states and 598 transitions. Second operand 8 states. [2019-01-18 18:11:53,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:53,758 INFO L93 Difference]: Finished difference Result 176 states and 800 transitions. [2019-01-18 18:11:53,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 18:11:53,759 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 18:11:53,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:53,761 INFO L225 Difference]: With dead ends: 176 [2019-01-18 18:11:53,761 INFO L226 Difference]: Without dead ends: 174 [2019-01-18 18:11:53,762 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 [2019-01-18 18:11:53,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-01-18 18:11:53,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 108. [2019-01-18 18:11:53,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-01-18 18:11:53,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-01-18 18:11:53,789 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-01-18 18:11:53,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:53,789 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-01-18 18:11:53,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:11:53,790 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-01-18 18:11:53,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:11:53,790 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:53,790 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:11:53,791 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:53,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:53,791 INFO L82 PathProgramCache]: Analyzing trace with hash 953504, now seen corresponding path program 1 times [2019-01-18 18:11:53,791 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:53,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:53,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:53,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:53,792 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:53,898 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:53,898 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:53,898 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 18:11:53,899 INFO L207 CegarAbsIntRunner]: [0], [30], [36], [37] [2019-01-18 18:11:53,899 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:53,899 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:54,063 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:54,064 INFO L272 AbstractInterpreter]: Visited 4 different actions 6 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 18:11:54,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:54,064 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:54,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:54,064 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:54,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:54,073 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:54,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:54,083 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-18 18:11:54,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,115 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-18 18:11:54,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,189 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-18 18:11:54,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,245 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-18 18:11:54,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,323 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-18 18:11:54,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:54,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-18 18:11:54,425 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:54,465 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:54,506 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:54,547 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:54,586 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:54,630 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:54,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:11:54,685 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-18 18:11:54,689 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-18 18:11:54,692 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-18 18:11:54,696 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-18 18:11:54,702 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-18 18:11:54,707 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-18 18:11:54,719 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-18 18:11:54,720 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:54,772 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:54,810 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:54,841 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:54,864 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:54,883 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:54,900 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:54,916 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:54,984 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:54,984 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-18 18:11:55,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:55,022 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-18 18:11:55,022 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:55,082 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:55,082 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-18 18:11:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:55,132 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:55,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:55,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:55,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 18:11:55,162 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:55,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 18:11:55,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 18:11:55,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 18:11:55,163 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 6 states. [2019-01-18 18:11:55,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:55,489 INFO L93 Difference]: Finished difference Result 135 states and 696 transitions. [2019-01-18 18:11:55,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 18:11:55,489 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-18 18:11:55,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:55,491 INFO L225 Difference]: With dead ends: 135 [2019-01-18 18:11:55,492 INFO L226 Difference]: Without dead ends: 134 [2019-01-18 18:11:55,492 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 18:11:55,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-01-18 18:11:55,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 108. [2019-01-18 18:11:55,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-01-18 18:11:55,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-01-18 18:11:55,512 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-01-18 18:11:55,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:55,512 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-01-18 18:11:55,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 18:11:55,512 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-01-18 18:11:55,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:11:55,513 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:55,513 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:11:55,513 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:55,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:55,513 INFO L82 PathProgramCache]: Analyzing trace with hash 29600478, now seen corresponding path program 1 times [2019-01-18 18:11:55,513 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:55,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:55,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:55,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:55,514 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:55,739 WARN L181 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 16 [2019-01-18 18:11:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:55,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:55,843 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:55,843 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:11:55,843 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [32], [35] [2019-01-18 18:11:55,845 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:55,845 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:11:56,491 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:11:56,491 INFO L272 AbstractInterpreter]: Visited 5 different actions 13 times. Merged at 2 different actions 2 times. Never widened. Found 9 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:11:56,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:56,492 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:11:56,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:56,492 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:56,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:56,501 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:56,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:56,626 WARN L181 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-18 18:11:56,630 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:11:56,632 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:11:56,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,638 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 32 treesize of output 46 [2019-01-18 18:11:56,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,645 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:11:56,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,655 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:11:56,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,664 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 18:11:56,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,674 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 18:11:56,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:56,688 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-18 18:11:56,689 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:56,772 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:56,819 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:56,857 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:56,888 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:56,913 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:56,931 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:56,953 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:57,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,003 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-18 18:11:57,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,061 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-18 18:11:57,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,119 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-18 18:11:57,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,193 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-18 18:11:57,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,278 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-18 18:11:57,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,391 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-18 18:11:57,525 WARN L181 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-18 18:11:57,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:57,541 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-18 18:11:57,542 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:57,597 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:57,653 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:57,711 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:57,770 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:57,829 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:57,889 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:57,984 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:57,984 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-18 18:11:58,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:58,019 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-18 18:11:58,019 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:58,113 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:58,113 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-18 18:11:58,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:58,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:58,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:58,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:58,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:58,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:58,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:58,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:58,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:58,156 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:11:58,157 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-18 18:11:58,158 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:58,250 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:58,251 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-18 18:11:58,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:58,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:58,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:58,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:58,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:58,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:58,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:58,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:58,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:58,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:58,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:58,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:58,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:58,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:58,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:11:58,298 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 169 [2019-01-18 18:11:58,299 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:58,392 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-18 18:11:58,392 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:89 [2019-01-18 18:11:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:58,433 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:58,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:58,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 18:11:58,490 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:58,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:11:58,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:11:58,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2019-01-18 18:11:58,491 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 10 states. [2019-01-18 18:11:59,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:59,571 INFO L93 Difference]: Finished difference Result 212 states and 968 transitions. [2019-01-18 18:11:59,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-18 18:11:59,572 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 18:11:59,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:59,575 INFO L225 Difference]: With dead ends: 212 [2019-01-18 18:11:59,575 INFO L226 Difference]: Without dead ends: 205 [2019-01-18 18:11:59,576 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 [2019-01-18 18:11:59,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-01-18 18:11:59,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 122. [2019-01-18 18:11:59,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-01-18 18:11:59,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 789 transitions. [2019-01-18 18:11:59,609 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 789 transitions. Word has length 5 [2019-01-18 18:11:59,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:59,610 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 789 transitions. [2019-01-18 18:11:59,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:11:59,610 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 789 transitions. [2019-01-18 18:11:59,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:11:59,611 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:59,611 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:11:59,611 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:59,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:59,611 INFO L82 PathProgramCache]: Analyzing trace with hash 29600106, now seen corresponding path program 1 times [2019-01-18 18:11:59,612 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:59,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:59,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:59,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:59,612 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:59,944 WARN L181 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-01-18 18:11:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:59,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:59,974 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:59,974 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:11:59,974 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [32], [35] [2019-01-18 18:11:59,975 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:11:59,975 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:12:00,624 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:12:00,625 INFO L272 AbstractInterpreter]: Visited 5 different actions 13 times. Merged at 2 different actions 2 times. Never widened. Found 9 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:12:00,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:00,625 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:12:00,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:00,625 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:12:00,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:12:00,642 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:12:00,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:00,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:12:00,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,689 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-18 18:12:00,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,756 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-18 18:12:00,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,825 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-18 18:12:00,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,906 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-18 18:12:00,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:00,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,009 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-18 18:12:01,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,134 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-18 18:12:01,258 WARN L181 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-18 18:12:01,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:01,285 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-18 18:12:01,286 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:01,354 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:01,418 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:01,493 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:01,565 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:01,635 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:01,711 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:01,802 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:12:01,806 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:12:01,809 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 18:12:01,811 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:12:01,816 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:12:01,819 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 18:12:01,823 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 18:12:01,828 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-18 18:12:01,828 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:01,901 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:01,944 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:01,977 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:02,001 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:02,021 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:02,039 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:02,056 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:02,153 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:02,153 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-18 18:12:02,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,191 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-18 18:12:02,191 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:02,285 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:02,286 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-18 18:12:02,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,328 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:12:02,329 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-18 18:12:02,329 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:02,423 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:02,423 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-18 18:12:02,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:02,476 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:12:02,477 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2019-01-18 18:12:02,478 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:02,582 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:02,583 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-01-18 18:12:02,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:02,641 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:12:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:02,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:12:02,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 18:12:02,698 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:12:02,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:12:02,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:12:02,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:12:02,699 INFO L87 Difference]: Start difference. First operand 122 states and 789 transitions. Second operand 10 states. [2019-01-18 18:12:05,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:12:05,832 INFO L93 Difference]: Finished difference Result 169 states and 850 transitions. [2019-01-18 18:12:05,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 18:12:05,833 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 18:12:05,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:12:05,835 INFO L225 Difference]: With dead ends: 169 [2019-01-18 18:12:05,835 INFO L226 Difference]: Without dead ends: 168 [2019-01-18 18:12:05,836 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-18 18:12:05,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-01-18 18:12:05,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2019-01-18 18:12:05,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-01-18 18:12:05,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 762 transitions. [2019-01-18 18:12:05,870 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 762 transitions. Word has length 5 [2019-01-18 18:12:05,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:12:05,871 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 762 transitions. [2019-01-18 18:12:05,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:12:05,871 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 762 transitions. [2019-01-18 18:12:05,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:12:05,872 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:12:05,872 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:12:05,872 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:12:05,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:05,872 INFO L82 PathProgramCache]: Analyzing trace with hash 29600602, now seen corresponding path program 1 times [2019-01-18 18:12:05,872 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:12:05,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:05,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:12:05,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:05,873 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:12:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:06,219 WARN L181 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2019-01-18 18:12:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:06,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:06,257 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:12:06,258 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:12:06,258 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [32], [35] [2019-01-18 18:12:06,259 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:12:06,259 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:12:06,967 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:12:06,967 INFO L272 AbstractInterpreter]: Visited 5 different actions 13 times. Merged at 2 different actions 2 times. Never widened. Found 9 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:12:06,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:06,967 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:12:06,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:06,968 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:12:06,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:12:06,976 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:12:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:06,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:12:07,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,031 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-18 18:12:07,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,086 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-18 18:12:07,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-18 18:12:07,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,237 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-18 18:12:07,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,332 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-18 18:12:07,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,447 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-18 18:12:07,576 WARN L181 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-18 18:12:07,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:07,594 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-18 18:12:07,595 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:07,654 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:07,712 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:07,774 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:07,834 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:07,894 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:07,957 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:08,032 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:12:08,035 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:12:08,038 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 18:12:08,042 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:12:08,046 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:12:08,049 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 18:12:08,054 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 18:12:08,057 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-18 18:12:08,058 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:08,131 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:08,174 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:08,207 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:08,231 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:08,251 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:08,268 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:08,283 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:08,377 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:08,378 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-18 18:12:08,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:08,417 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-18 18:12:08,417 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:08,512 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:08,513 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-18 18:12:08,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:08,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:08,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:08,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:08,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:08,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:08,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:08,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:08,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:08,559 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:12:08,560 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-18 18:12:08,561 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:08,656 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:08,656 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-18 18:12:08,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:08,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:08,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:08,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:08,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:08,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:08,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:08,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:08,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:08,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:08,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:08,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:08,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:08,721 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:12:08,722 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2019-01-18 18:12:08,723 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:08,817 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:08,817 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-01-18 18:12:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:08,902 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:12:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:08,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:12:08,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 18:12:08,960 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:12:08,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:12:08,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:12:08,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:12:08,961 INFO L87 Difference]: Start difference. First operand 119 states and 762 transitions. Second operand 10 states. [2019-01-18 18:12:10,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:12:10,447 INFO L93 Difference]: Finished difference Result 176 states and 845 transitions. [2019-01-18 18:12:10,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 18:12:10,447 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 18:12:10,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:12:10,450 INFO L225 Difference]: With dead ends: 176 [2019-01-18 18:12:10,450 INFO L226 Difference]: Without dead ends: 172 [2019-01-18 18:12:10,451 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-18 18:12:10,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-01-18 18:12:10,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 125. [2019-01-18 18:12:10,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-01-18 18:12:10,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 788 transitions. [2019-01-18 18:12:10,478 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 788 transitions. Word has length 5 [2019-01-18 18:12:10,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:12:10,478 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 788 transitions. [2019-01-18 18:12:10,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:12:10,478 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 788 transitions. [2019-01-18 18:12:10,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:12:10,478 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:12:10,478 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:12:10,479 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:12:10,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:10,479 INFO L82 PathProgramCache]: Analyzing trace with hash 29588822, now seen corresponding path program 1 times [2019-01-18 18:12:10,479 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:12:10,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:10,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:12:10,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:10,480 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:12:10,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:10,635 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2019-01-18 18:12:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:10,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:10,678 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:12:10,678 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:12:10,678 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [32], [35] [2019-01-18 18:12:10,679 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:12:10,679 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:12:11,324 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:12:11,325 INFO L272 AbstractInterpreter]: Visited 5 different actions 13 times. Merged at 2 different actions 2 times. Never widened. Found 9 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 18:12:11,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:11,325 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:12:11,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:11,325 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:12:11,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:12:11,333 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:12:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:11,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:12:11,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,371 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 18:12:11,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,432 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 18:12:11,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,485 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 18:12:11,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,549 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 18:12:11,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,630 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 18:12:11,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:11,734 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 18:12:11,735 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:11,777 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:11,818 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:11,861 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:11,904 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:11,948 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:12,001 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:12:12,019 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:12:12,030 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 18:12:12,033 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:12:12,036 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:12:12,039 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 18:12:12,044 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 18:12:12,053 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 18:12:12,053 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:12,108 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:12,151 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:12,183 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:12,207 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:12,227 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:12,244 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:12,260 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:12,332 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:12,333 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-18 18:12:12,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:12,441 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2019-01-18 18:12:12,441 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-18 18:12:12,478 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-18 18:12:14,106 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2019-01-18 18:12:14,107 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:814 [2019-01-18 18:12:14,590 WARN L181 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 160 [2019-01-18 18:12:14,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:14,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:14,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:14,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:14,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:14,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:14,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:14,605 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:12:14,605 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 126 [2019-01-18 18:12:14,606 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:14,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:14,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:14,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:14,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:14,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:14,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:14,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:14,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:14,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:14,821 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 178 [2019-01-18 18:12:14,821 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:15,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,081 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 150 [2019-01-18 18:12:15,082 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:15,279 INFO L267 ElimStorePlain]: Start of recursive call 1: 15 dim-0 vars, 3 dim-1 vars, End of recursive call: 15 dim-0 vars, and 3 xjuncts. [2019-01-18 18:12:15,279 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 18 variables, input treesize:325, output treesize:277 [2019-01-18 18:12:15,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,375 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 168 [2019-01-18 18:12:15,375 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:15,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,612 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:12:15,613 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 147 [2019-01-18 18:12:15,614 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:15,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:15,819 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 150 [2019-01-18 18:12:15,819 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:15,985 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2019-01-18 18:12:15,986 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:307, output treesize:237 [2019-01-18 18:12:16,143 WARN L181 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2019-01-18 18:12:16,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:16,146 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:12:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:16,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:12:16,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2019-01-18 18:12:16,190 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:12:16,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:12:16,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:12:16,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-01-18 18:12:16,191 INFO L87 Difference]: Start difference. First operand 125 states and 788 transitions. Second operand 10 states. [2019-01-18 18:12:16,465 WARN L181 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 73 [2019-01-18 18:12:20,106 WARN L181 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 147 [2019-01-18 18:12:21,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:12:21,254 INFO L93 Difference]: Finished difference Result 235 states and 1248 transitions. [2019-01-18 18:12:21,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-01-18 18:12:21,254 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 18:12:21,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:12:21,257 INFO L225 Difference]: With dead ends: 235 [2019-01-18 18:12:21,257 INFO L226 Difference]: Without dead ends: 230 [2019-01-18 18:12:21,258 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-01-18 18:12:21,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-01-18 18:12:21,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 145. [2019-01-18 18:12:21,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-01-18 18:12:21,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 973 transitions. [2019-01-18 18:12:21,304 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 973 transitions. Word has length 5 [2019-01-18 18:12:21,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:12:21,304 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 973 transitions. [2019-01-18 18:12:21,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:12:21,304 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 973 transitions. [2019-01-18 18:12:21,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 18:12:21,305 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:12:21,305 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 18:12:21,305 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:12:21,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:21,306 INFO L82 PathProgramCache]: Analyzing trace with hash 29589382, now seen corresponding path program 1 times [2019-01-18 18:12:21,306 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:12:21,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:21,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:12:21,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:21,307 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:12:21,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:21,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:21,414 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:12:21,414 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 18:12:21,414 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [36], [37] [2019-01-18 18:12:21,415 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:12:21,415 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:12:21,939 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:12:21,939 INFO L272 AbstractInterpreter]: Visited 5 different actions 11 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 18:12:21,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:21,940 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:12:21,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:21,940 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:12:21,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:12:21,948 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:12:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:21,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:12:21,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:21,985 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 18:12:22,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,044 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 18:12:22,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,097 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 18:12:22,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,175 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 18:12:22,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,256 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 18:12:22,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:22,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 18:12:22,360 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:22,400 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:22,442 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:22,483 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:22,526 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:22,569 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:22,624 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 18:12:22,627 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 18:12:22,630 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 18:12:22,634 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 18:12:22,637 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 18:12:22,640 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 18:12:22,644 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 18:12:22,659 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 18:12:22,659 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:22,716 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:22,757 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:22,790 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:22,813 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:22,833 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:22,852 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:22,868 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:22,940 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 18:12:22,941 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-18 18:12:23,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:23,187 INFO L303 Elim1Store]: Index analysis took 220 ms [2019-01-18 18:12:23,245 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2019-01-18 18:12:23,245 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-18 18:12:23,272 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-18 18:12:24,896 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2019-01-18 18:12:24,896 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:812 [2019-01-18 18:12:25,290 WARN L181 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 160 [2019-01-18 18:12:25,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,305 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 18:12:25,306 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 [2019-01-18 18:12:25,307 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:25,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,571 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 170 [2019-01-18 18:12:25,572 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:25,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:12:25,826 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 142 [2019-01-18 18:12:25,827 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:26,017 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2019-01-18 18:12:26,018 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:325, output treesize:277 [2019-01-18 18:12:32,230 WARN L181 SmtUtils]: Spent 5.08 s on a formula simplification that was a NOOP. DAG size: 158 [2019-01-18 18:12:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:32,239 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:12:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:32,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:12:32,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 18:12:32,296 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:12:32,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:12:32,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:12:32,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-01-18 18:12:32,297 INFO L87 Difference]: Start difference. First operand 145 states and 973 transitions. Second operand 8 states. [2019-01-18 18:12:37,618 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-01-18 18:12:37,620 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:102) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.pop(ManagedScript.java:131) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:652) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:256) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:164) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:715) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:628) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:472) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.io.IOException: Stream closed at java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:433) at java.io.OutputStream.write(OutputStream.java:116) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:297) at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141) at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229) at java.io.BufferedWriter.flush(BufferedWriter.java:254) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:120) ... 28 more [2019-01-18 18:12:37,624 INFO L168 Benchmark]: Toolchain (without parser) took 168202.14 ms. Allocated memory was 135.3 MB in the beginning and 627.0 MB in the end (delta: 491.8 MB). Free memory was 110.4 MB in the beginning and 284.3 MB in the end (delta: -173.9 MB). Peak memory consumption was 317.9 MB. Max. memory is 7.1 GB. [2019-01-18 18:12:37,624 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 135.3 MB. Free memory is still 111.9 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-18 18:12:37,624 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.14 ms. Allocated memory is still 135.3 MB. Free memory was 110.4 MB in the beginning and 108.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-01-18 18:12:37,625 INFO L168 Benchmark]: Boogie Preprocessor took 43.32 ms. Allocated memory is still 135.3 MB. Free memory was 108.0 MB in the beginning and 106.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-01-18 18:12:37,625 INFO L168 Benchmark]: RCFGBuilder took 410.44 ms. Allocated memory is still 135.3 MB. Free memory was 106.7 MB in the beginning and 93.7 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2019-01-18 18:12:37,625 INFO L168 Benchmark]: TraceAbstraction took 167674.89 ms. Allocated memory was 135.3 MB in the beginning and 627.0 MB in the end (delta: 491.8 MB). Free memory was 93.5 MB in the beginning and 284.3 MB in the end (delta: -190.8 MB). Peak memory consumption was 301.0 MB. Max. memory is 7.1 GB. [2019-01-18 18:12:37,627 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 135.3 MB. Free memory is still 111.9 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 69.14 ms. Allocated memory is still 135.3 MB. Free memory was 110.4 MB in the beginning and 108.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 43.32 ms. Allocated memory is still 135.3 MB. Free memory was 108.0 MB in the beginning and 106.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 410.44 ms. Allocated memory is still 135.3 MB. Free memory was 106.7 MB in the beginning and 93.7 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 167674.89 ms. Allocated memory was 135.3 MB in the beginning and 627.0 MB in the end (delta: 491.8 MB). Free memory was 93.5 MB in the beginning and 284.3 MB in the end (delta: -190.8 MB). Peak memory consumption was 301.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...