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-e1a14da [2018-12-24 14:30:35,892 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-24 14:30:35,897 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-24 14:30:35,915 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-24 14:30:35,915 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-24 14:30:35,917 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-24 14:30:35,919 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-24 14:30:35,922 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-24 14:30:35,924 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-24 14:30:35,925 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-24 14:30:35,926 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-12-24 14:30:35,967 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf [2018-12-24 14:30:35,995 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-24 14:30:35,996 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-24 14:30:36,001 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-24 14:30:36,001 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-24 14:30:36,001 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-24 14:30:36,002 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-24 14:30:36,002 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2018-12-24 14:30:36,002 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-24 14:30:36,002 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-24 14:30:36,002 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2018-12-24 14:30:36,003 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-24 14:30:36,003 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-24 14:30:36,003 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-24 14:30:36,006 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-24 14:30:36,007 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-24 14:30:36,007 INFO L133 SettingsManager]: * Use SBE=true [2018-12-24 14:30:36,007 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-24 14:30:36,007 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-24 14:30:36,007 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-24 14:30:36,008 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-24 14:30:36,008 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-24 14:30:36,008 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-24 14:30:36,008 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-24 14:30:36,008 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-24 14:30:36,008 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-24 14:30:36,011 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-24 14:30:36,011 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-24 14:30:36,011 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-24 14:30:36,011 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-24 14:30:36,012 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-24 14:30:36,012 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-24 14:30:36,012 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-24 14:30:36,012 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-24 14:30:36,012 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-24 14:30:36,012 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-24 14:30:36,013 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-24 14:30:36,013 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-24 14:30:36,013 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-24 14:30:36,013 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-24 14:30:36,052 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-24 14:30:36,064 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-24 14:30:36,067 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-24 14:30:36,069 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-24 14:30:36,070 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-24 14:30:36,070 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl [2018-12-24 14:30:36,071 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl' [2018-12-24 14:30:36,115 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-24 14:30:36,117 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-24 14:30:36,118 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-24 14:30:36,118 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-24 14:30:36,118 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-24 14:30:36,136 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 24.12 02:30:36" (1/1) ... [2018-12-24 14:30:36,150 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 24.12 02:30:36" (1/1) ... [2018-12-24 14:30:36,180 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-24 14:30:36,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-24 14:30:36,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-24 14:30:36,181 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-24 14:30:36,194 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 24.12 02:30:36" (1/1) ... [2018-12-24 14:30:36,194 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 24.12 02:30:36" (1/1) ... [2018-12-24 14:30:36,196 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 24.12 02:30:36" (1/1) ... [2018-12-24 14:30:36,197 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 24.12 02:30:36" (1/1) ... [2018-12-24 14:30:36,202 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 24.12 02:30:36" (1/1) ... [2018-12-24 14:30:36,210 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 24.12 02:30:36" (1/1) ... [2018-12-24 14:30:36,211 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 24.12 02:30:36" (1/1) ... [2018-12-24 14:30:36,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-24 14:30:36,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-24 14:30:36,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-24 14:30:36,219 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-24 14:30:36,220 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 24.12 02:30:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-24 14:30:36,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-24 14:30:36,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-24 14:30:36,875 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-24 14:30:36,875 INFO L280 CfgBuilder]: Removed 19 assue(true) statements. [2018-12-24 14:30:36,876 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 02:30:36 BoogieIcfgContainer [2018-12-24 14:30:36,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-24 14:30:36,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-24 14:30:36,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-24 14:30:36,882 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-24 14:30:36,882 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 24.12 02:30:36" (1/2) ... [2018-12-24 14:30:36,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e3c2213 and model type speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.12 02:30:36, skipping insertion in model container [2018-12-24 14:30:36,884 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 24.12 02:30:36" (2/2) ... [2018-12-24 14:30:36,886 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-8-unlimited.bpl [2018-12-24 14:30:36,899 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-24 14:30:36,918 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2018-12-24 14:30:36,965 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2018-12-24 14:30:37,031 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-24 14:30:37,032 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-24 14:30:37,032 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-24 14:30:37,032 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-24 14:30:37,032 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-24 14:30:37,033 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-24 14:30:37,033 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-24 14:30:37,033 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-24 14:30:37,053 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-12-24 14:30:37,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-12-24 14:30:37,060 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:37,061 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2018-12-24 14:30:37,064 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:37,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:37,071 INFO L82 PathProgramCache]: Analyzing trace with hash 996, now seen corresponding path program 1 times [2018-12-24 14:30:37,074 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:37,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:37,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:37,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:37,143 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:37,348 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 14:30:37,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-12-24 14:30:37,348 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:30:37,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-24 14:30:37,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-24 14:30:37,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 14:30:37,369 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2018-12-24 14:30:37,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:37,649 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2018-12-24 14:30:37,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 14:30:37,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-12-24 14:30:37,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:37,666 INFO L225 Difference]: With dead ends: 37 [2018-12-24 14:30:37,666 INFO L226 Difference]: Without dead ends: 32 [2018-12-24 14:30:37,670 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 14:30:37,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-24 14:30:37,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 18. [2018-12-24 14:30:37,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-24 14:30:37,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 33 transitions. [2018-12-24 14:30:37,710 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 33 transitions. Word has length 2 [2018-12-24 14:30:37,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:37,712 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 33 transitions. [2018-12-24 14:30:37,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-24 14:30:37,712 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 33 transitions. [2018-12-24 14:30:37,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 14:30:37,713 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:37,713 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 14:30:37,714 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:37,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:37,714 INFO L82 PathProgramCache]: Analyzing trace with hash 30818, now seen corresponding path program 1 times [2018-12-24 14:30:37,715 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:37,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:37,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:37,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:37,716 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:37,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:37,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:37,983 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:37,984 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 14:30:37,989 INFO L207 CegarAbsIntRunner]: [0], [32], [35] [2018-12-24 14:30:38,067 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:38,067 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:42,173 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:42,174 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. [2018-12-24 14:30:42,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:42,182 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:42,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:42,183 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:30:42,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:42,199 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:42,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:42,523 WARN L181 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2018-12-24 14:30:42,560 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 [2018-12-24 14:30:42,578 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 [2018-12-24 14:30:42,612 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,616 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,618 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 [2018-12-24 14:30:42,654 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,676 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,691 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,695 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 [2018-12-24 14:30:42,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,769 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,794 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,818 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,819 INFO L303 Elim1Store]: Index analysis took 119 ms [2018-12-24 14:30:42,820 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 [2018-12-24 14:30:42,865 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,869 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,873 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,875 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,878 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,880 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 [2018-12-24 14:30:42,919 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,922 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,936 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,953 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,969 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 [2018-12-24 14:30:43,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,037 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,078 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,100 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,125 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,150 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,151 INFO L303 Elim1Store]: Index analysis took 177 ms [2018-12-24 14:30:43,153 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2018-12-24 14:30:43,155 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,482 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,882 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,940 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,978 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:44,009 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:44,036 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:44,067 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:44,145 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,146 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 [2018-12-24 14:30:44,219 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,220 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,222 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 [2018-12-24 14:30:44,346 WARN L181 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2018-12-24 14:30:44,350 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,354 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,355 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,356 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,358 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 [2018-12-24 14:30:44,526 WARN L181 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2018-12-24 14:30:44,548 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,550 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,552 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,555 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,557 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,561 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 [2018-12-24 14:30:44,674 WARN L181 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2018-12-24 14:30:44,681 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,682 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,683 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,685 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,686 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,687 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,690 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,692 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,695 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 [2018-12-24 14:30:44,880 WARN L181 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2018-12-24 14:30:44,889 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,890 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,891 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,893 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,894 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,896 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,897 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,899 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,901 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,902 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,905 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2018-12-24 14:30:45,069 WARN L181 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-12-24 14:30:45,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,080 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,083 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,084 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,086 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,087 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,089 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,090 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,091 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,093 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,095 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,098 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 [2018-12-24 14:30:45,099 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:45,201 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:45,350 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:45,411 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:45,476 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:45,537 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:45,601 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:45,751 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:45,752 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:147, output treesize:153 [2018-12-24 14:30:45,814 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,815 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 [2018-12-24 14:30:45,816 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:46,003 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. [2018-12-24 14:30:46,004 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2018-12-24 14:30:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:46,030 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:46,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:46,071 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:46,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:30:46,071 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:46,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:30:46,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:30:46,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:30:46,073 INFO L87 Difference]: Start difference. First operand 18 states and 33 transitions. Second operand 6 states. [2018-12-24 14:30:57,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:57,701 INFO L93 Difference]: Finished difference Result 63 states and 92 transitions. [2018-12-24 14:30:57,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:30:57,701 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 14:30:57,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:57,703 INFO L225 Difference]: With dead ends: 63 [2018-12-24 14:30:57,703 INFO L226 Difference]: Without dead ends: 60 [2018-12-24 14:30:57,704 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:30:57,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-24 14:30:57,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 25. [2018-12-24 14:30:57,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-24 14:30:57,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 53 transitions. [2018-12-24 14:30:57,712 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 53 transitions. Word has length 3 [2018-12-24 14:30:57,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:57,712 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 53 transitions. [2018-12-24 14:30:57,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:30:57,712 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 53 transitions. [2018-12-24 14:30:57,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 14:30:57,713 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:57,713 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 14:30:57,713 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:57,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:57,714 INFO L82 PathProgramCache]: Analyzing trace with hash 30384, now seen corresponding path program 1 times [2018-12-24 14:30:57,714 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:57,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:57,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:57,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:57,715 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:57,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:57,804 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:57,805 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 14:30:57,805 INFO L207 CegarAbsIntRunner]: [0], [18], [35] [2018-12-24 14:30:57,807 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:57,807 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:58,143 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:58,144 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:30:58,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:58,144 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:58,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:58,145 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:30:58,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:58,163 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:58,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:58,407 WARN L181 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2018-12-24 14:30:58,419 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 [2018-12-24 14:30:58,434 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 [2018-12-24 14:30:58,476 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:58,501 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:58,502 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:30:58,543 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:58,566 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:58,589 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:58,590 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 [2018-12-24 14:30:58,625 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:58,626 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:58,628 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:58,630 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:58,631 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 [2018-12-24 14:30:58,660 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:58,683 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:58,707 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:58,728 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:58,753 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:58,754 INFO L303 Elim1Store]: Index analysis took 120 ms [2018-12-24 14:30:58,755 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 [2018-12-24 14:30:58,796 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:58,821 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:58,846 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:58,863 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:58,881 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:58,908 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:58,909 INFO L303 Elim1Store]: Index analysis took 150 ms [2018-12-24 14:30:58,910 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2018-12-24 14:30:58,933 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 [2018-12-24 14:30:58,934 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:59,001 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:59,113 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:59,150 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:59,180 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:59,205 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:59,226 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:59,251 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:59,345 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,347 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 [2018-12-24 14:30:59,395 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,396 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,398 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 [2018-12-24 14:30:59,470 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,471 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,474 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 [2018-12-24 14:30:59,552 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,553 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,554 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,555 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,555 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,556 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,558 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 [2018-12-24 14:30:59,633 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,634 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,637 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,638 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,639 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,639 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,640 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,641 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,643 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 [2018-12-24 14:30:59,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,743 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,748 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,749 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,750 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,751 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,753 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:59,754 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 [2018-12-24 14:30:59,755 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:59,795 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:59,836 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:59,880 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:59,922 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:59,965 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:00,042 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:00,042 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2018-12-24 14:31:00,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:00,103 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2018-12-24 14:31:00,104 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:00,172 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:00,173 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2018-12-24 14:31:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:00,197 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:00,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:00,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:31:00,227 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:00,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:31:00,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:31:00,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:31:00,228 INFO L87 Difference]: Start difference. First operand 25 states and 53 transitions. Second operand 6 states. [2018-12-24 14:31:01,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:01,211 INFO L93 Difference]: Finished difference Result 62 states and 99 transitions. [2018-12-24 14:31:01,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:31:01,212 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 14:31:01,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:01,214 INFO L225 Difference]: With dead ends: 62 [2018-12-24 14:31:01,214 INFO L226 Difference]: Without dead ends: 60 [2018-12-24 14:31:01,215 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 [2018-12-24 14:31:01,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-24 14:31:01,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 26. [2018-12-24 14:31:01,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-24 14:31:01,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 61 transitions. [2018-12-24 14:31:01,222 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 61 transitions. Word has length 3 [2018-12-24 14:31:01,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:01,222 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 61 transitions. [2018-12-24 14:31:01,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:31:01,223 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 61 transitions. [2018-12-24 14:31:01,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 14:31:01,223 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:01,223 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 14:31:01,223 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:01,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:01,224 INFO L82 PathProgramCache]: Analyzing trace with hash 30944, now seen corresponding path program 1 times [2018-12-24 14:31:01,224 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:01,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:01,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:01,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:01,225 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:01,303 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 14:31:01,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-12-24 14:31:01,303 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:31:01,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-24 14:31:01,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-24 14:31:01,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 14:31:01,304 INFO L87 Difference]: Start difference. First operand 26 states and 61 transitions. Second operand 3 states. [2018-12-24 14:31:01,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:01,399 INFO L93 Difference]: Finished difference Result 31 states and 61 transitions. [2018-12-24 14:31:01,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 14:31:01,399 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-24 14:31:01,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:01,400 INFO L225 Difference]: With dead ends: 31 [2018-12-24 14:31:01,400 INFO L226 Difference]: Without dead ends: 30 [2018-12-24 14:31:01,403 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 14:31:01,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-24 14:31:01,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2018-12-24 14:31:01,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-24 14:31:01,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 60 transitions. [2018-12-24 14:31:01,410 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 60 transitions. Word has length 3 [2018-12-24 14:31:01,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:01,410 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 60 transitions. [2018-12-24 14:31:01,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-24 14:31:01,411 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 60 transitions. [2018-12-24 14:31:01,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 14:31:01,411 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:01,411 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 14:31:01,412 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:01,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:01,412 INFO L82 PathProgramCache]: Analyzing trace with hash 30012, now seen corresponding path program 1 times [2018-12-24 14:31:01,412 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:01,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:01,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:01,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:01,413 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:01,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:01,523 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:01,523 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:01,523 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 14:31:01,524 INFO L207 CegarAbsIntRunner]: [0], [6], [35] [2018-12-24 14:31:01,525 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:01,525 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:01,863 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:01,864 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:31:01,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:01,864 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:01,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:01,865 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:01,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:01,887 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:01,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:02,141 WARN L181 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2018-12-24 14:31:02,179 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,180 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2018-12-24 14:31:02,273 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,275 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2018-12-24 14:31:02,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,390 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,413 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,437 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,438 INFO L303 Elim1Store]: Index analysis took 106 ms [2018-12-24 14:31:02,439 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 [2018-12-24 14:31:02,616 WARN L181 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2018-12-24 14:31:02,621 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,623 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,624 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,626 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,627 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,629 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,630 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 [2018-12-24 14:31:02,751 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,775 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,777 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,778 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,779 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,780 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,781 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,784 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 [2018-12-24 14:31:02,889 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2018-12-24 14:31:02,893 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,894 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,895 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,896 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,898 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,899 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,901 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,902 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,904 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,905 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,907 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 [2018-12-24 14:31:02,908 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:02,969 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:03,019 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:03,097 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:03,204 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:03,301 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:03,365 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 [2018-12-24 14:31:03,370 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 [2018-12-24 14:31:03,375 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 [2018-12-24 14:31:03,380 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 [2018-12-24 14:31:03,385 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 [2018-12-24 14:31:03,390 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 [2018-12-24 14:31:03,403 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 [2018-12-24 14:31:03,420 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 [2018-12-24 14:31:03,422 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:03,506 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:03,553 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:03,587 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:03,610 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:03,731 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:03,749 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:03,766 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:03,840 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. [2018-12-24 14:31:03,840 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 9 variables, input treesize:121, output treesize:125 [2018-12-24 14:31:03,897 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:03,898 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 [2018-12-24 14:31:03,899 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:03,969 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. [2018-12-24 14:31:03,970 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2018-12-24 14:31:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:03,994 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:04,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:04,023 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-24 14:31:04,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2018-12-24 14:31:04,024 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:31:04,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 14:31:04,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 14:31:04,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 14:31:04,026 INFO L87 Difference]: Start difference. First operand 26 states and 60 transitions. Second operand 4 states. [2018-12-24 14:31:04,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:04,127 INFO L93 Difference]: Finished difference Result 32 states and 98 transitions. [2018-12-24 14:31:04,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-24 14:31:04,127 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-12-24 14:31:04,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:04,129 INFO L225 Difference]: With dead ends: 32 [2018-12-24 14:31:04,129 INFO L226 Difference]: Without dead ends: 31 [2018-12-24 14:31:04,130 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 [2018-12-24 14:31:04,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-12-24 14:31:04,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2018-12-24 14:31:04,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-24 14:31:04,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 97 transitions. [2018-12-24 14:31:04,138 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 97 transitions. Word has length 3 [2018-12-24 14:31:04,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:04,138 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 97 transitions. [2018-12-24 14:31:04,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 14:31:04,138 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 97 transitions. [2018-12-24 14:31:04,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 14:31:04,139 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:04,139 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 14:31:04,139 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:04,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:04,140 INFO L82 PathProgramCache]: Analyzing trace with hash 30136, now seen corresponding path program 1 times [2018-12-24 14:31:04,140 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:04,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:04,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:04,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:04,141 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:04,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:04,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:04,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:04,212 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:04,212 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 14:31:04,212 INFO L207 CegarAbsIntRunner]: [0], [10], [35] [2018-12-24 14:31:04,213 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:04,214 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:04,507 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:04,507 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:31:04,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:04,508 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:04,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:04,508 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:04,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:04,526 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:04,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:04,576 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 [2018-12-24 14:31:04,581 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 [2018-12-24 14:31:04,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:04,589 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:04,590 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 [2018-12-24 14:31:04,601 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:04,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:04,605 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:04,606 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 [2018-12-24 14:31:04,615 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:04,617 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:04,619 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:04,621 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:04,622 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:31:04,667 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:04,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:04,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:04,675 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:04,677 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:04,678 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 [2018-12-24 14:31:04,684 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:04,686 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:04,687 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:04,689 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:04,690 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:04,691 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:04,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2018-12-24 14:31:04,709 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 [2018-12-24 14:31:04,711 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:04,773 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:04,821 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:04,860 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:04,886 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:04,909 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:04,931 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:04,948 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:04,996 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:04,997 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 [2018-12-24 14:31:05,053 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,054 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,056 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 [2018-12-24 14:31:05,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,119 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,121 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 [2018-12-24 14:31:05,192 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,194 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,195 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,196 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,197 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,200 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 [2018-12-24 14:31:05,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,277 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,278 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,279 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,280 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,281 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,287 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,288 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 [2018-12-24 14:31:05,397 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2018-12-24 14:31:05,402 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,408 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,409 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,411 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,412 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,413 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 [2018-12-24 14:31:05,414 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:05,456 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:05,498 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:05,540 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:05,583 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:05,626 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:05,702 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:05,702 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2018-12-24 14:31:05,752 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,753 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 [2018-12-24 14:31:05,754 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:05,831 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. [2018-12-24 14:31:05,831 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2018-12-24 14:31:05,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:05,887 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:05,918 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:05,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:31:05,918 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:05,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:31:05,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:31:05,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:31:05,922 INFO L87 Difference]: Start difference. First operand 30 states and 97 transitions. Second operand 6 states. [2018-12-24 14:31:06,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:06,832 INFO L93 Difference]: Finished difference Result 65 states and 143 transitions. [2018-12-24 14:31:06,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:31:06,833 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 14:31:06,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:06,834 INFO L225 Difference]: With dead ends: 65 [2018-12-24 14:31:06,834 INFO L226 Difference]: Without dead ends: 64 [2018-12-24 14:31:06,834 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 [2018-12-24 14:31:06,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-12-24 14:31:06,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2018-12-24 14:31:06,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-24 14:31:06,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 115 transitions. [2018-12-24 14:31:06,844 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 115 transitions. Word has length 3 [2018-12-24 14:31:06,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:06,844 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 115 transitions. [2018-12-24 14:31:06,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:31:06,844 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 115 transitions. [2018-12-24 14:31:06,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 14:31:06,845 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:06,845 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 14:31:06,845 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:06,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:06,846 INFO L82 PathProgramCache]: Analyzing trace with hash 30632, now seen corresponding path program 1 times [2018-12-24 14:31:06,846 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:06,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:06,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:06,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:06,847 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:06,962 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:06,963 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:06,963 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 14:31:06,963 INFO L207 CegarAbsIntRunner]: [0], [26], [35] [2018-12-24 14:31:06,964 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:06,965 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:07,221 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:07,221 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:31:07,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:07,221 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:07,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:07,222 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:07,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:07,234 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:07,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:07,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:07,301 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 [2018-12-24 14:31:07,304 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 [2018-12-24 14:31:07,310 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,311 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,312 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 [2018-12-24 14:31:07,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,322 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,324 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,325 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 [2018-12-24 14:31:07,334 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,336 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,338 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,341 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 [2018-12-24 14:31:07,350 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,352 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,354 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,356 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,358 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,359 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 [2018-12-24 14:31:07,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,369 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,370 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,371 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,372 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 [2018-12-24 14:31:07,385 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 [2018-12-24 14:31:07,387 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:07,866 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:07,912 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:07,950 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:07,980 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:08,015 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:08,035 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:08,055 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:08,107 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,108 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2018-12-24 14:31:08,153 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,155 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,156 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 [2018-12-24 14:31:08,202 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,203 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,204 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,205 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,206 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2018-12-24 14:31:08,269 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,270 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,272 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,273 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,275 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,277 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 [2018-12-24 14:31:08,353 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,354 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,355 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,357 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,358 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,359 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,360 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,362 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,363 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 [2018-12-24 14:31:08,456 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,457 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,458 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,459 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,460 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,461 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,465 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,466 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,467 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 [2018-12-24 14:31:08,468 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:08,510 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:08,551 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:08,593 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:08,636 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:08,680 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:08,758 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:08,759 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2018-12-24 14:31:08,802 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,803 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 [2018-12-24 14:31:08,804 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:08,877 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. [2018-12-24 14:31:08,878 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2018-12-24 14:31:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:08,899 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:08,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:08,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:31:08,935 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:08,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:31:08,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:31:08,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:31:08,935 INFO L87 Difference]: Start difference. First operand 32 states and 115 transitions. Second operand 6 states. [2018-12-24 14:31:09,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:09,752 INFO L93 Difference]: Finished difference Result 67 states and 161 transitions. [2018-12-24 14:31:09,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:31:09,752 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 14:31:09,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:09,754 INFO L225 Difference]: With dead ends: 67 [2018-12-24 14:31:09,754 INFO L226 Difference]: Without dead ends: 65 [2018-12-24 14:31:09,755 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 [2018-12-24 14:31:09,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-12-24 14:31:09,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2018-12-24 14:31:09,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-24 14:31:09,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 132 transitions. [2018-12-24 14:31:09,765 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 132 transitions. Word has length 3 [2018-12-24 14:31:09,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:09,765 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 132 transitions. [2018-12-24 14:31:09,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:31:09,765 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 132 transitions. [2018-12-24 14:31:09,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:31:09,766 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:09,766 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:31:09,767 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:09,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:09,767 INFO L82 PathProgramCache]: Analyzing trace with hash 954866, now seen corresponding path program 1 times [2018-12-24 14:31:09,767 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:09,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:09,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:09,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:09,768 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:09,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:09,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:09,911 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:09,911 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:31:09,911 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [35] [2018-12-24 14:31:09,914 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:09,914 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:10,766 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:10,767 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. [2018-12-24 14:31:10,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:10,767 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:10,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:10,768 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:10,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:10,785 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:10,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:10,914 WARN L181 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2018-12-24 14:31:10,920 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 [2018-12-24 14:31:10,933 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2018-12-24 14:31:10,939 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,941 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,942 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 [2018-12-24 14:31:10,950 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,952 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,954 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,955 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 [2018-12-24 14:31:10,966 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,968 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,969 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 [2018-12-24 14:31:10,976 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,977 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,979 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,981 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,983 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,984 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 [2018-12-24 14:31:11,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,048 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,069 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,075 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,076 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,078 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,079 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 [2018-12-24 14:31:11,089 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,091 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,093 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,095 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,097 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,098 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,100 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2018-12-24 14:31:11,102 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:11,424 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:11,534 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:11,572 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:11,605 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:11,629 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:11,650 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:11,669 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:11,719 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,720 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 117 treesize of output 114 [2018-12-24 14:31:11,804 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,805 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,807 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 [2018-12-24 14:31:11,911 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,913 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,914 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,915 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,916 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 [2018-12-24 14:31:11,984 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,984 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,986 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,987 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,988 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,989 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,990 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 [2018-12-24 14:31:12,076 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,078 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,080 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,081 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,084 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,085 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,086 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 [2018-12-24 14:31:12,188 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,189 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,191 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,192 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,193 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,194 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,196 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,197 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,200 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 [2018-12-24 14:31:12,330 WARN L181 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-12-24 14:31:12,338 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,339 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,341 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,342 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,343 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,346 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,347 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,348 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,349 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,350 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 [2018-12-24 14:31:12,351 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:12,409 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:12,469 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:12,529 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:12,592 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:12,655 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:12,719 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:12,818 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. [2018-12-24 14:31:12,818 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2018-12-24 14:31:12,858 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,859 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 [2018-12-24 14:31:12,860 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:12,959 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. [2018-12-24 14:31:12,959 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2018-12-24 14:31:13,064 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,065 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,066 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,068 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,069 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,070 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,071 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,072 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,073 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,074 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:31:13,075 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 [2018-12-24 14:31:13,076 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:13,233 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. [2018-12-24 14:31:13,234 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2018-12-24 14:31:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:13,297 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:13,359 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:13,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:31:13,360 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:13,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:31:13,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:31:13,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:31:13,361 INFO L87 Difference]: Start difference. First operand 34 states and 132 transitions. Second operand 8 states. [2018-12-24 14:31:17,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:17,845 INFO L93 Difference]: Finished difference Result 82 states and 191 transitions. [2018-12-24 14:31:17,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:31:17,845 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:31:17,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:17,847 INFO L225 Difference]: With dead ends: 82 [2018-12-24 14:31:17,847 INFO L226 Difference]: Without dead ends: 80 [2018-12-24 14:31:17,848 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:31:17,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-12-24 14:31:17,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 36. [2018-12-24 14:31:17,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-12-24 14:31:17,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 128 transitions. [2018-12-24 14:31:17,861 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 128 transitions. Word has length 4 [2018-12-24 14:31:17,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:17,862 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 128 transitions. [2018-12-24 14:31:17,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:31:17,862 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 128 transitions. [2018-12-24 14:31:17,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:31:17,863 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:17,863 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:31:17,863 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:17,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:17,863 INFO L82 PathProgramCache]: Analyzing trace with hash 955426, now seen corresponding path program 1 times [2018-12-24 14:31:17,864 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:17,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:17,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:17,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:17,865 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:17,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:17,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:17,975 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:17,975 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:31:17,975 INFO L207 CegarAbsIntRunner]: [0], [32], [36], [37] [2018-12-24 14:31:17,977 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:17,978 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:19,782 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:19,782 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. [2018-12-24 14:31:19,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:19,783 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:19,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:19,783 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:19,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:19,793 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:19,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:19,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:19,808 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 [2018-12-24 14:31:19,834 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,841 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,842 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 [2018-12-24 14:31:19,898 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,901 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,907 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,910 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,910 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 [2018-12-24 14:31:19,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,971 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,973 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,976 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,978 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,984 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,985 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 [2018-12-24 14:31:20,070 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:20,073 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:20,075 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:20,077 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:20,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:20,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:20,084 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:20,090 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:20,091 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 [2018-12-24 14:31:20,185 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:20,187 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:20,189 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:20,191 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:20,192 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:20,194 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:20,196 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:20,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:20,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:20,203 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:20,204 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 [2018-12-24 14:31:20,205 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:20,260 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:20,317 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:20,374 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:20,433 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:20,494 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:20,632 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 [2018-12-24 14:31:20,636 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 [2018-12-24 14:31:20,643 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2018-12-24 14:31:20,647 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 [2018-12-24 14:31:20,654 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 [2018-12-24 14:31:20,685 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 [2018-12-24 14:31:20,725 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 [2018-12-24 14:31:20,747 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 [2018-12-24 14:31:20,748 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:20,804 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:20,845 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:20,876 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:20,901 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:20,920 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:20,937 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:20,954 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:21,025 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:21,026 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2018-12-24 14:31:21,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:21,883 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 [2018-12-24 14:31:21,883 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2018-12-24 14:31:21,940 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2018-12-24 14:31:23,881 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. [2018-12-24 14:31:23,881 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:131, output treesize:853 [2018-12-24 14:31:33,167 WARN L181 SmtUtils]: Spent 7.79 s on a formula simplification. DAG size of input: 472 DAG size of output: 98 [2018-12-24 14:31:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:33,173 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:33,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:33,201 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-24 14:31:33,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2018-12-24 14:31:33,202 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:31:33,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 14:31:33,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 14:31:33,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 14:31:33,202 INFO L87 Difference]: Start difference. First operand 36 states and 128 transitions. Second operand 4 states. [2018-12-24 14:31:33,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:33,256 INFO L93 Difference]: Finished difference Result 40 states and 140 transitions. [2018-12-24 14:31:33,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 14:31:33,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-12-24 14:31:33,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:33,257 INFO L225 Difference]: With dead ends: 40 [2018-12-24 14:31:33,257 INFO L226 Difference]: Without dead ends: 39 [2018-12-24 14:31:33,258 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 14:31:33,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-24 14:31:33,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-12-24 14:31:33,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-12-24 14:31:33,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 138 transitions. [2018-12-24 14:31:33,274 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 138 transitions. Word has length 4 [2018-12-24 14:31:33,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:33,275 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 138 transitions. [2018-12-24 14:31:33,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 14:31:33,275 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 138 transitions. [2018-12-24 14:31:33,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:31:33,275 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:33,275 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:31:33,277 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:33,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:33,278 INFO L82 PathProgramCache]: Analyzing trace with hash 954990, now seen corresponding path program 1 times [2018-12-24 14:31:33,278 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:33,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:33,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:33,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:33,279 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:33,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:33,364 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:33,364 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:31:33,364 INFO L207 CegarAbsIntRunner]: [0], [22], [32], [35] [2018-12-24 14:31:33,365 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:33,365 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:34,048 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:34,049 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. [2018-12-24 14:31:34,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:34,049 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:34,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:34,049 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:34,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:34,058 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:34,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:34,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:34,124 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,125 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 [2018-12-24 14:31:34,206 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,209 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 [2018-12-24 14:31:34,266 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,269 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,272 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,275 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 [2018-12-24 14:31:34,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,343 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,346 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,349 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,352 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,356 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,356 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 [2018-12-24 14:31:34,435 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,440 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,443 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,445 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,448 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,450 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,453 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,454 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 [2018-12-24 14:31:34,560 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,562 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,564 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,566 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,567 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,570 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,572 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,574 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,577 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,580 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,580 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 [2018-12-24 14:31:34,708 WARN L181 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-12-24 14:31:34,714 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,715 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,717 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,718 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,720 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,722 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,724 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,725 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,727 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,729 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,731 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,732 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:34,733 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 [2018-12-24 14:31:34,734 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:34,800 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:34,862 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:34,933 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:35,007 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:35,082 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:35,158 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:35,239 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 [2018-12-24 14:31:35,242 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 [2018-12-24 14:31:35,245 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 [2018-12-24 14:31:35,251 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 [2018-12-24 14:31:35,258 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 [2018-12-24 14:31:35,261 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 [2018-12-24 14:31:35,279 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 [2018-12-24 14:31:35,286 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 [2018-12-24 14:31:35,287 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:35,359 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:35,400 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:35,433 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:35,458 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:35,479 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:35,496 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:35,512 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:35,605 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:35,606 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2018-12-24 14:31:35,640 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:35,641 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 [2018-12-24 14:31:35,642 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:35,735 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. [2018-12-24 14:31:35,735 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2018-12-24 14:31:35,765 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:35,766 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:35,767 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:35,768 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:35,769 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:35,770 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:35,772 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:35,773 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:35,774 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:35,775 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:35,776 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 [2018-12-24 14:31:35,777 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:35,896 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. [2018-12-24 14:31:35,897 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2018-12-24 14:31:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:35,983 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:36,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:36,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:31:36,052 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:36,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:31:36,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:31:36,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:31:36,053 INFO L87 Difference]: Start difference. First operand 38 states and 138 transitions. Second operand 8 states. [2018-12-24 14:31:39,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:39,848 INFO L93 Difference]: Finished difference Result 84 states and 220 transitions. [2018-12-24 14:31:39,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:31:39,850 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:31:39,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:39,852 INFO L225 Difference]: With dead ends: 84 [2018-12-24 14:31:39,852 INFO L226 Difference]: Without dead ends: 82 [2018-12-24 14:31:39,852 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:31:39,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-12-24 14:31:39,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 43. [2018-12-24 14:31:39,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-12-24 14:31:39,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2018-12-24 14:31:39,862 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2018-12-24 14:31:39,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:39,862 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2018-12-24 14:31:39,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:31:39,863 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2018-12-24 14:31:39,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:31:39,863 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:39,863 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:31:39,864 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:39,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:39,864 INFO L82 PathProgramCache]: Analyzing trace with hash 954618, now seen corresponding path program 1 times [2018-12-24 14:31:39,864 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:39,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:39,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:39,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:39,865 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:40,201 WARN L181 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2018-12-24 14:31:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:40,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:40,217 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:40,217 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:31:40,217 INFO L207 CegarAbsIntRunner]: [0], [10], [32], [35] [2018-12-24 14:31:40,218 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:40,218 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:40,849 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:40,849 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. [2018-12-24 14:31:40,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:40,850 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:40,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:40,850 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:40,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:40,858 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:40,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:40,910 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,912 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 [2018-12-24 14:31:40,979 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,981 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,981 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2018-12-24 14:31:41,049 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,050 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,052 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,053 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,054 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 [2018-12-24 14:31:41,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,122 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,123 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,124 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,125 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,126 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 [2018-12-24 14:31:41,206 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,207 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,209 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,211 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,212 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,214 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,215 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2018-12-24 14:31:41,312 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,313 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,314 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,316 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,317 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,318 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,319 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,322 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,323 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,324 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 [2018-12-24 14:31:41,449 WARN L181 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-12-24 14:31:41,454 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,456 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,457 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,458 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,459 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,461 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,463 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,465 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,466 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:41,467 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 [2018-12-24 14:31:41,468 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:41,530 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:41,587 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:41,647 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:41,708 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:41,769 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:41,832 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:41,946 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 [2018-12-24 14:31:41,950 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 [2018-12-24 14:31:41,953 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 [2018-12-24 14:31:41,960 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 [2018-12-24 14:31:41,963 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 [2018-12-24 14:31:41,966 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 [2018-12-24 14:31:41,970 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 [2018-12-24 14:31:41,975 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 [2018-12-24 14:31:41,975 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:42,072 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:42,130 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:42,174 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:42,211 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:42,237 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:42,258 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:42,277 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:42,370 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:42,371 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2018-12-24 14:31:42,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,407 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 [2018-12-24 14:31:42,408 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:42,500 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:42,500 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2018-12-24 14:31:42,532 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,533 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,534 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,535 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,536 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,537 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,538 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,539 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,540 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,541 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:31:42,542 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 [2018-12-24 14:31:42,543 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:42,644 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. [2018-12-24 14:31:42,645 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2018-12-24 14:31:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:42,706 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:42,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:42,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:31:42,752 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:42,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:31:42,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:31:42,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:31:42,753 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2018-12-24 14:31:46,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:46,618 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2018-12-24 14:31:46,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:31:46,620 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:31:46,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:46,620 INFO L225 Difference]: With dead ends: 81 [2018-12-24 14:31:46,621 INFO L226 Difference]: Without dead ends: 80 [2018-12-24 14:31:46,621 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 [2018-12-24 14:31:46,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-12-24 14:31:46,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 43. [2018-12-24 14:31:46,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-12-24 14:31:46,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2018-12-24 14:31:46,630 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2018-12-24 14:31:46,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:46,630 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2018-12-24 14:31:46,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:31:46,630 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2018-12-24 14:31:46,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:31:46,631 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:46,631 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:31:46,631 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:46,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:46,632 INFO L82 PathProgramCache]: Analyzing trace with hash 955114, now seen corresponding path program 1 times [2018-12-24 14:31:46,632 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:46,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:46,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:46,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:46,633 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:46,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:46,960 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:46,960 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:31:46,960 INFO L207 CegarAbsIntRunner]: [0], [26], [32], [35] [2018-12-24 14:31:46,961 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:46,962 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:47,618 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:47,618 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. [2018-12-24 14:31:47,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:47,618 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:47,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:47,619 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:47,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:47,627 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:47,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:47,678 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:47,679 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 [2018-12-24 14:31:47,737 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:47,739 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:47,740 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 [2018-12-24 14:31:47,796 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:47,798 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:47,801 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:47,803 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:47,804 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 [2018-12-24 14:31:47,868 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:47,871 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:47,874 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:47,877 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:47,880 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:47,883 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:47,883 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2018-12-24 14:31:47,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:47,969 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:47,971 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:47,973 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:47,975 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:47,977 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:47,978 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:47,980 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:47,981 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 [2018-12-24 14:31:48,088 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:48,091 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:48,093 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:48,096 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:48,098 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:48,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:48,104 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:48,106 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:48,109 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:48,111 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:48,112 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 [2018-12-24 14:31:48,231 WARN L181 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-12-24 14:31:48,236 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:48,238 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:48,239 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:48,240 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:48,242 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:48,244 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:48,246 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:48,247 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:48,249 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:48,250 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:48,251 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:48,253 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:48,254 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 [2018-12-24 14:31:48,255 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:48,322 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:48,390 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:48,461 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:48,535 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:48,604 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:48,675 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:48,760 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 [2018-12-24 14:31:48,763 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 [2018-12-24 14:31:48,766 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 [2018-12-24 14:31:48,770 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 [2018-12-24 14:31:48,774 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 [2018-12-24 14:31:48,777 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 [2018-12-24 14:31:48,780 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 [2018-12-24 14:31:48,784 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 [2018-12-24 14:31:48,785 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:48,855 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:48,896 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:48,928 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:48,952 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:48,972 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:48,990 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:49,004 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:49,097 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:49,098 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2018-12-24 14:31:49,169 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,170 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 [2018-12-24 14:31:49,171 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:49,281 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. [2018-12-24 14:31:49,281 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2018-12-24 14:31:49,310 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,311 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,312 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,313 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,314 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,315 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,317 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,318 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,319 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,319 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:31:49,321 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 [2018-12-24 14:31:49,322 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:49,418 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. [2018-12-24 14:31:49,419 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2018-12-24 14:31:49,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:49,566 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:49,610 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:49,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:31:49,610 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:49,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:31:49,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:31:49,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:31:49,611 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2018-12-24 14:31:51,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:51,102 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2018-12-24 14:31:51,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:31:51,102 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:31:51,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:51,103 INFO L225 Difference]: With dead ends: 81 [2018-12-24 14:31:51,104 INFO L226 Difference]: Without dead ends: 79 [2018-12-24 14:31:51,104 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:31:51,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-12-24 14:31:51,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 44. [2018-12-24 14:31:51,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-24 14:31:51,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 175 transitions. [2018-12-24 14:31:51,115 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 175 transitions. Word has length 4 [2018-12-24 14:31:51,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:51,115 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 175 transitions. [2018-12-24 14:31:51,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:31:51,116 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 175 transitions. [2018-12-24 14:31:51,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:31:51,116 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:51,116 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:31:51,117 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:51,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:51,117 INFO L82 PathProgramCache]: Analyzing trace with hash 954742, now seen corresponding path program 1 times [2018-12-24 14:31:51,117 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:51,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:51,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:51,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:51,118 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:51,275 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:51,275 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:51,275 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:31:51,276 INFO L207 CegarAbsIntRunner]: [0], [14], [32], [35] [2018-12-24 14:31:51,279 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:51,279 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:52,137 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:52,138 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. [2018-12-24 14:31:52,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:52,138 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:52,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:52,138 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:52,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:52,147 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:52,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:52,225 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 [2018-12-24 14:31:52,232 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 [2018-12-24 14:31:52,235 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,238 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,238 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 [2018-12-24 14:31:52,246 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,247 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,247 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,248 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 [2018-12-24 14:31:52,254 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,256 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,258 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,260 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,261 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2018-12-24 14:31:52,270 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,272 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,285 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,289 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,290 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 [2018-12-24 14:31:52,294 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,295 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,296 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,298 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,299 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,301 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,302 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 [2018-12-24 14:31:52,307 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,309 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,311 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,313 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,315 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,317 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,321 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,321 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 [2018-12-24 14:31:52,322 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:52,406 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:52,454 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:52,491 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:52,519 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:52,543 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:52,563 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:52,583 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:52,631 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,632 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2018-12-24 14:31:52,685 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,687 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,687 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 [2018-12-24 14:31:52,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,746 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,748 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,749 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 [2018-12-24 14:31:52,812 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,814 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,815 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,816 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,817 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,818 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,819 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2018-12-24 14:31:52,897 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,899 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,900 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,901 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,902 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,903 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,904 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,905 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,906 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 [2018-12-24 14:31:53,961 WARN L181 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2018-12-24 14:31:53,996 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:54,017 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:54,034 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:54,054 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:54,080 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:54,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:54,124 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:54,147 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:54,169 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:54,189 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:54,190 INFO L303 Elim1Store]: Index analysis took 226 ms [2018-12-24 14:31:54,191 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 [2018-12-24 14:31:55,509 WARN L181 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-12-24 14:31:55,546 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,571 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,592 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,614 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,639 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,660 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,685 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,701 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,722 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,743 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,768 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,791 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,791 INFO L303 Elim1Store]: Index analysis took 280 ms [2018-12-24 14:31:55,792 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 [2018-12-24 14:31:55,793 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:56,504 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:57,014 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:57,071 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:57,129 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:57,187 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:57,246 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:57,354 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:57,355 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2018-12-24 14:31:57,392 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:57,393 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 [2018-12-24 14:31:57,394 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:57,503 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. [2018-12-24 14:31:57,504 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2018-12-24 14:31:57,532 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:57,538 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:57,539 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:57,539 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:57,540 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:57,541 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:57,543 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:57,544 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:57,545 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:57,546 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:57,547 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 [2018-12-24 14:31:57,548 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:57,674 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. [2018-12-24 14:31:57,674 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2018-12-24 14:31:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:57,769 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:57,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:57,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:31:57,821 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:57,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:31:57,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:31:57,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:31:57,822 INFO L87 Difference]: Start difference. First operand 44 states and 175 transitions. Second operand 8 states. [2018-12-24 14:32:01,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:01,207 INFO L93 Difference]: Finished difference Result 99 states and 274 transitions. [2018-12-24 14:32:01,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:32:01,208 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:32:01,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:01,209 INFO L225 Difference]: With dead ends: 99 [2018-12-24 14:32:01,209 INFO L226 Difference]: Without dead ends: 95 [2018-12-24 14:32:01,210 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:32:01,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-12-24 14:32:01,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 52. [2018-12-24 14:32:01,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-12-24 14:32:01,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 210 transitions. [2018-12-24 14:32:01,220 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 210 transitions. Word has length 4 [2018-12-24 14:32:01,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:01,220 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 210 transitions. [2018-12-24 14:32:01,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:32:01,220 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 210 transitions. [2018-12-24 14:32:01,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:32:01,221 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:01,221 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:32:01,221 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:01,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:01,222 INFO L82 PathProgramCache]: Analyzing trace with hash 941536, now seen corresponding path program 1 times [2018-12-24 14:32:01,222 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:01,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:01,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:01,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:01,223 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:01,547 WARN L181 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2018-12-24 14:32:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:01,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:01,734 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:01,734 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:32:01,734 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [35] [2018-12-24 14:32:01,735 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:01,735 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:02,118 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:02,118 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:32:02,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:02,119 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:02,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:02,119 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:32:02,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:02,176 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:02,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:02,419 WARN L181 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2018-12-24 14:32:02,440 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 [2018-12-24 14:32:02,451 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 [2018-12-24 14:32:02,495 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,503 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,503 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2018-12-24 14:32:02,509 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,511 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,512 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,513 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 [2018-12-24 14:32:02,518 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,521 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,522 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,523 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,523 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 [2018-12-24 14:32:02,535 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,536 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,537 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,538 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,539 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,540 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 [2018-12-24 14:32:02,544 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,546 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,547 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,548 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,549 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,551 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,552 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:32:02,568 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2018-12-24 14:32:02,569 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:02,625 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:02,670 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:02,706 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:02,735 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:02,758 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:02,776 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:02,795 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:02,840 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,841 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 [2018-12-24 14:32:02,884 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,886 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,886 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2018-12-24 14:32:02,933 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,935 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,936 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,937 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,938 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 [2018-12-24 14:32:02,993 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,994 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,995 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,997 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,998 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:02,999 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,000 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 [2018-12-24 14:32:03,066 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,068 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,069 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,070 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,071 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,072 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,073 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,074 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,075 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2018-12-24 14:32:03,166 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,167 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,168 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,170 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,171 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,172 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,173 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,175 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,176 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,177 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 [2018-12-24 14:32:03,178 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:03,215 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:03,253 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:03,298 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:03,337 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:03,376 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:03,445 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:03,445 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2018-12-24 14:32:03,492 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,493 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 [2018-12-24 14:32:03,494 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:03,560 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:03,560 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2018-12-24 14:32:03,590 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,593 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,594 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,595 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,597 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,598 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,599 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 [2018-12-24 14:32:03,600 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:03,668 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. [2018-12-24 14:32:03,669 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2018-12-24 14:32:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:03,693 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:03,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:03,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:32:03,734 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:03,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:32:03,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:32:03,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:32:03,735 INFO L87 Difference]: Start difference. First operand 52 states and 210 transitions. Second operand 8 states. [2018-12-24 14:32:04,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:04,268 INFO L93 Difference]: Finished difference Result 101 states and 289 transitions. [2018-12-24 14:32:04,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:32:04,269 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:32:04,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:04,270 INFO L225 Difference]: With dead ends: 101 [2018-12-24 14:32:04,270 INFO L226 Difference]: Without dead ends: 99 [2018-12-24 14:32:04,270 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:32:04,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-12-24 14:32:04,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 59. [2018-12-24 14:32:04,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-24 14:32:04,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 243 transitions. [2018-12-24 14:32:04,284 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 243 transitions. Word has length 4 [2018-12-24 14:32:04,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:04,284 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 243 transitions. [2018-12-24 14:32:04,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:32:04,284 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 243 transitions. [2018-12-24 14:32:04,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:32:04,285 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:04,285 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:32:04,286 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:04,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:04,286 INFO L82 PathProgramCache]: Analyzing trace with hash 941164, now seen corresponding path program 1 times [2018-12-24 14:32:04,286 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:04,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:04,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:04,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:04,287 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:04,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:04,570 WARN L181 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2018-12-24 14:32:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:04,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:04,582 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:04,582 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:32:04,582 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [35] [2018-12-24 14:32:04,585 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:04,585 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:04,862 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:04,863 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:32:04,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:04,863 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:04,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:04,863 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:32:04,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:04,872 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:04,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:04,926 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:04,926 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 [2018-12-24 14:32:04,974 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:04,975 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:04,976 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 [2018-12-24 14:32:05,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:05,023 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:05,024 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:05,025 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:05,025 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 [2018-12-24 14:32:05,692 WARN L181 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2018-12-24 14:32:05,735 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:05,756 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:05,780 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:05,806 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:05,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:05,852 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:05,852 INFO L303 Elim1Store]: Index analysis took 158 ms [2018-12-24 14:32:05,853 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 [2018-12-24 14:32:06,517 WARN L181 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2018-12-24 14:32:06,521 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,522 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,523 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,524 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,525 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,527 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,528 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,529 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,530 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 [2018-12-24 14:32:06,626 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,627 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,628 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,629 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,630 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,632 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,633 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,634 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,635 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,636 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,637 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 [2018-12-24 14:32:06,638 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:06,678 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:06,718 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:06,756 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:06,797 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:06,839 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:06,889 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 [2018-12-24 14:32:06,893 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 [2018-12-24 14:32:06,897 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 [2018-12-24 14:32:06,900 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2018-12-24 14:32:06,904 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2018-12-24 14:32:06,907 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 [2018-12-24 14:32:06,912 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 [2018-12-24 14:32:06,922 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2018-12-24 14:32:06,923 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:06,975 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:07,016 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:07,045 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:07,070 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:07,320 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:07,377 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:07,392 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:07,458 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:07,459 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2018-12-24 14:32:07,508 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:07,509 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 [2018-12-24 14:32:07,509 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:07,575 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:07,576 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2018-12-24 14:32:07,631 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:07,652 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:07,665 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:07,683 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:07,684 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:07,684 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:07,685 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:07,685 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:07,686 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 [2018-12-24 14:32:07,687 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:07,753 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. [2018-12-24 14:32:07,754 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2018-12-24 14:32:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:07,817 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:07,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:07,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:07,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:32:07,860 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:07,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:32:07,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:32:07,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:32:07,862 INFO L87 Difference]: Start difference. First operand 59 states and 243 transitions. Second operand 8 states. [2018-12-24 14:32:08,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:08,539 INFO L93 Difference]: Finished difference Result 99 states and 302 transitions. [2018-12-24 14:32:08,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:32:08,540 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:32:08,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:08,541 INFO L225 Difference]: With dead ends: 99 [2018-12-24 14:32:08,541 INFO L226 Difference]: Without dead ends: 98 [2018-12-24 14:32:08,541 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 [2018-12-24 14:32:08,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-12-24 14:32:08,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2018-12-24 14:32:08,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-12-24 14:32:08,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 261 transitions. [2018-12-24 14:32:08,554 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 261 transitions. Word has length 4 [2018-12-24 14:32:08,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:08,554 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 261 transitions. [2018-12-24 14:32:08,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:32:08,554 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 261 transitions. [2018-12-24 14:32:08,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:32:08,555 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:08,555 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:32:08,555 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:08,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:08,555 INFO L82 PathProgramCache]: Analyzing trace with hash 941660, now seen corresponding path program 1 times [2018-12-24 14:32:08,556 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:08,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:08,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:08,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:08,557 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:08,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:08,633 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:08,633 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:32:08,633 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [35] [2018-12-24 14:32:08,634 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:08,634 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:08,886 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:08,886 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:32:08,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:08,886 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:08,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:08,886 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:32:08,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:08,894 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:08,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:08,940 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 [2018-12-24 14:32:08,942 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 [2018-12-24 14:32:08,949 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:08,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:08,957 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 [2018-12-24 14:32:08,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:08,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:08,969 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:08,969 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 [2018-12-24 14:32:08,973 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:08,975 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:08,979 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:08,981 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:08,981 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 [2018-12-24 14:32:08,987 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:08,989 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:08,991 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:08,993 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:08,995 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:08,995 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2018-12-24 14:32:09,003 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,005 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,007 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,009 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,011 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,013 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,014 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:32:09,030 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2018-12-24 14:32:09,031 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,087 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,131 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,165 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,194 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,214 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,233 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,274 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,319 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,320 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 91 treesize of output 91 [2018-12-24 14:32:09,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,367 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,368 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 [2018-12-24 14:32:09,414 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,416 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,417 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,419 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 [2018-12-24 14:32:09,476 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,482 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,483 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 [2018-12-24 14:32:09,553 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,554 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,555 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,556 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,557 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,559 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,560 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,561 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,562 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 [2018-12-24 14:32:09,652 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,652 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,653 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,654 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,655 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,656 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,657 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,659 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,660 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,661 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,661 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 [2018-12-24 14:32:09,662 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,740 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,778 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,817 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,856 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,896 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,964 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:09,965 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2018-12-24 14:32:10,009 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:10,010 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 [2018-12-24 14:32:10,010 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:10,070 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:10,071 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2018-12-24 14:32:10,100 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:10,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:10,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:10,103 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:10,104 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:10,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:10,106 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:10,106 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:10,107 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2018-12-24 14:32:10,108 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:10,174 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:10,175 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2018-12-24 14:32:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:10,195 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:10,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:10,237 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:10,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:32:10,237 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:10,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:32:10,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:32:10,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:32:10,238 INFO L87 Difference]: Start difference. First operand 61 states and 261 transitions. Second operand 8 states. [2018-12-24 14:32:12,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:12,004 INFO L93 Difference]: Finished difference Result 101 states and 320 transitions. [2018-12-24 14:32:12,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:32:12,005 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:32:12,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:12,006 INFO L225 Difference]: With dead ends: 101 [2018-12-24 14:32:12,006 INFO L226 Difference]: Without dead ends: 99 [2018-12-24 14:32:12,007 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 [2018-12-24 14:32:12,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-12-24 14:32:12,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 62. [2018-12-24 14:32:12,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-24 14:32:12,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 278 transitions. [2018-12-24 14:32:12,022 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 278 transitions. Word has length 4 [2018-12-24 14:32:12,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:12,022 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 278 transitions. [2018-12-24 14:32:12,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:32:12,023 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 278 transitions. [2018-12-24 14:32:12,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:32:12,023 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:12,023 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:32:12,024 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:12,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:12,024 INFO L82 PathProgramCache]: Analyzing trace with hash 941288, now seen corresponding path program 1 times [2018-12-24 14:32:12,024 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:12,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:12,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:12,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:12,025 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:12,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:12,095 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:12,095 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:32:12,096 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [35] [2018-12-24 14:32:12,097 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:12,097 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:12,386 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:12,387 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:32:12,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:12,387 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:12,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:12,387 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:32:12,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:12,396 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:12,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:12,454 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,455 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 [2018-12-24 14:32:12,507 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,509 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,510 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2018-12-24 14:32:12,583 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,584 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,585 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,585 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,586 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 [2018-12-24 14:32:12,651 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,652 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,654 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,657 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,659 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,662 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,662 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 [2018-12-24 14:32:12,755 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,757 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,760 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,760 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,762 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,764 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,765 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,765 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,766 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 [2018-12-24 14:32:12,917 WARN L181 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2018-12-24 14:32:12,921 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,922 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,923 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,924 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,926 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,929 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,930 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,931 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,932 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 [2018-12-24 14:32:12,932 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:12,971 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:13,011 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:13,051 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:13,093 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:13,134 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:13,187 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 [2018-12-24 14:32:13,191 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 [2018-12-24 14:32:13,196 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2018-12-24 14:32:13,199 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2018-12-24 14:32:13,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2018-12-24 14:32:13,207 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 [2018-12-24 14:32:13,210 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 [2018-12-24 14:32:13,219 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2018-12-24 14:32:13,220 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:13,272 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:13,313 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:13,344 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:13,368 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:13,388 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:13,405 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:13,421 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:13,489 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:13,490 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2018-12-24 14:32:13,540 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:13,540 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 [2018-12-24 14:32:13,541 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:13,603 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:13,603 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2018-12-24 14:32:13,678 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:13,680 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:13,683 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:13,684 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:13,684 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:13,685 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:13,686 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:13,687 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:13,688 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:13,688 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2018-12-24 14:32:13,689 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:13,755 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. [2018-12-24 14:32:13,756 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2018-12-24 14:32:13,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:13,779 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:13,819 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:13,819 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:32:13,820 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:13,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:32:13,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:32:13,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:32:13,820 INFO L87 Difference]: Start difference. First operand 62 states and 278 transitions. Second operand 8 states. [2018-12-24 14:32:14,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:14,472 INFO L93 Difference]: Finished difference Result 106 states and 350 transitions. [2018-12-24 14:32:14,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:32:14,473 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:32:14,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:14,474 INFO L225 Difference]: With dead ends: 106 [2018-12-24 14:32:14,474 INFO L226 Difference]: Without dead ends: 104 [2018-12-24 14:32:14,474 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:32:14,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-12-24 14:32:14,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 65. [2018-12-24 14:32:14,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-12-24 14:32:14,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 304 transitions. [2018-12-24 14:32:14,488 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 304 transitions. Word has length 4 [2018-12-24 14:32:14,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:14,489 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 304 transitions. [2018-12-24 14:32:14,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:32:14,489 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 304 transitions. [2018-12-24 14:32:14,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:32:14,489 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:14,489 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:32:14,490 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:14,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:14,490 INFO L82 PathProgramCache]: Analyzing trace with hash 941784, now seen corresponding path program 1 times [2018-12-24 14:32:14,490 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:14,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:14,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:14,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:14,491 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:14,769 WARN L181 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2018-12-24 14:32:14,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:14,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:14,788 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:14,788 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:32:14,788 INFO L207 CegarAbsIntRunner]: [0], [18], [30], [35] [2018-12-24 14:32:14,792 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:14,792 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:15,073 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:15,073 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:32:15,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:15,073 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:15,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:15,074 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:32:15,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:15,086 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:15,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:15,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:15,153 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 [2018-12-24 14:32:15,155 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 [2018-12-24 14:32:15,158 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,159 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,159 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 [2018-12-24 14:32:15,163 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,167 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,170 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,170 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 [2018-12-24 14:32:15,179 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,180 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,181 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,182 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,182 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 [2018-12-24 14:32:15,186 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,187 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,188 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,190 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,191 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,192 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 [2018-12-24 14:32:15,196 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,197 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,202 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,203 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 [2018-12-24 14:32:15,215 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 [2018-12-24 14:32:15,216 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:15,276 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:15,320 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:15,355 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:15,384 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:15,407 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:15,426 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:15,444 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:15,488 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,489 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 [2018-12-24 14:32:15,534 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,535 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,536 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 [2018-12-24 14:32:15,581 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,582 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,583 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,584 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,585 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 [2018-12-24 14:32:15,641 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,642 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,644 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,645 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,646 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,647 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,648 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2018-12-24 14:32:15,719 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,720 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,721 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,722 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,724 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,725 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,726 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,727 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 [2018-12-24 14:32:15,817 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,818 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,819 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,820 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,821 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,822 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,823 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,824 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,825 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,826 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:15,827 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 [2018-12-24 14:32:15,828 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:15,881 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:15,920 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:15,958 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:15,997 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:16,037 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:16,106 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:16,106 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2018-12-24 14:32:16,151 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:16,152 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 [2018-12-24 14:32:16,153 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:16,215 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:16,215 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2018-12-24 14:32:16,267 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:16,269 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:16,269 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:16,270 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:16,271 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:16,272 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:16,273 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:16,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:16,275 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:16,276 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 [2018-12-24 14:32:16,277 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:16,342 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:16,342 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2018-12-24 14:32:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:16,374 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:16,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:16,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:16,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:32:16,414 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:16,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:32:16,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:32:16,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:32:16,415 INFO L87 Difference]: Start difference. First operand 65 states and 304 transitions. Second operand 8 states. [2018-12-24 14:32:17,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:17,108 INFO L93 Difference]: Finished difference Result 107 states and 376 transitions. [2018-12-24 14:32:17,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:32:17,109 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:32:17,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:17,110 INFO L225 Difference]: With dead ends: 107 [2018-12-24 14:32:17,110 INFO L226 Difference]: Without dead ends: 99 [2018-12-24 14:32:17,111 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 [2018-12-24 14:32:17,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-12-24 14:32:17,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2018-12-24 14:32:17,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-12-24 14:32:17,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 328 transitions. [2018-12-24 14:32:17,123 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 328 transitions. Word has length 4 [2018-12-24 14:32:17,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:17,124 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 328 transitions. [2018-12-24 14:32:17,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:32:17,124 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 328 transitions. [2018-12-24 14:32:17,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:32:17,125 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:17,125 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:32:17,125 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:17,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:17,125 INFO L82 PathProgramCache]: Analyzing trace with hash 930314, now seen corresponding path program 1 times [2018-12-24 14:32:17,125 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:17,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:17,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:17,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:17,126 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:17,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:17,217 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:17,217 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:32:17,217 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [35] [2018-12-24 14:32:17,218 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:17,219 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:17,859 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:17,859 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. [2018-12-24 14:32:17,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:17,859 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:17,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:17,859 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 [2018-12-24 14:32:17,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:17,868 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:17,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:17,908 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:17,908 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2018-12-24 14:32:17,969 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:17,972 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:17,972 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 [2018-12-24 14:32:18,036 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,040 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,042 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,042 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 [2018-12-24 14:32:18,124 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,127 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,130 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,130 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,131 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,132 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,132 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 [2018-12-24 14:32:18,212 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,214 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,215 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,216 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,217 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,218 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,220 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,221 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,222 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 [2018-12-24 14:32:18,310 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,311 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,312 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,313 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,314 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,316 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,317 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,318 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,319 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,321 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 [2018-12-24 14:32:18,321 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:18,361 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:18,401 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:18,442 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:18,483 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:18,524 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:18,573 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 [2018-12-24 14:32:18,576 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 [2018-12-24 14:32:18,578 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2018-12-24 14:32:18,582 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 [2018-12-24 14:32:18,584 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 [2018-12-24 14:32:18,588 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 [2018-12-24 14:32:18,592 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 [2018-12-24 14:32:18,604 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 [2018-12-24 14:32:18,605 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:18,666 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:18,772 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:18,980 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:19,005 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:19,029 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:19,046 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:19,062 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:19,130 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:19,131 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2018-12-24 14:32:19,164 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:19,174 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 [2018-12-24 14:32:19,176 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:32:19,399 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. [2018-12-24 14:32:19,399 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:201 [2018-12-24 14:32:19,507 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:19,509 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:19,514 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:19,516 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:19,518 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:19,520 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:19,522 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:19,524 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:19,525 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:19,526 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:19,573 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 [2018-12-24 14:32:19,574 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-12-24 14:32:19,592 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 64 xjuncts. [2018-12-24 14:32:20,612 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:20,613 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:20,615 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:20,616 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:20,617 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:20,618 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:20,620 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:20,620 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:20,621 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 [2018-12-24 14:32:20,622 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:21,024 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. [2018-12-24 14:32:21,024 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:218, output treesize:686 [2018-12-24 14:32:21,889 WARN L181 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 114 [2018-12-24 14:32:21,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:21,891 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:21,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:21,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2018-12-24 14:32:21,934 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:21,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:32:21,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:32:21,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:32:21,935 INFO L87 Difference]: Start difference. First operand 66 states and 328 transitions. Second operand 8 states. [2018-12-24 14:32:25,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:25,798 INFO L93 Difference]: Finished difference Result 155 states and 556 transitions. [2018-12-24 14:32:25,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:32:25,803 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:32:25,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:25,805 INFO L225 Difference]: With dead ends: 155 [2018-12-24 14:32:25,805 INFO L226 Difference]: Without dead ends: 152 [2018-12-24 14:32:25,805 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 [2018-12-24 14:32:25,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-12-24 14:32:25,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 78. [2018-12-24 14:32:25,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-12-24 14:32:25,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 438 transitions. [2018-12-24 14:32:25,824 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 438 transitions. Word has length 4 [2018-12-24 14:32:25,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:25,825 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 438 transitions. [2018-12-24 14:32:25,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:32:25,825 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 438 transitions. [2018-12-24 14:32:25,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:32:25,825 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:25,825 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:32:25,826 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:25,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:25,827 INFO L82 PathProgramCache]: Analyzing trace with hash 930440, now seen corresponding path program 1 times [2018-12-24 14:32:25,827 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:25,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:25,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:25,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:25,828 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:26,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:26,000 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:26,001 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:32:26,001 INFO L207 CegarAbsIntRunner]: [0], [6], [36], [37] [2018-12-24 14:32:26,003 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:26,003 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:26,242 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:26,242 INFO L272 AbstractInterpreter]: Visited 4 different actions 6 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:32:26,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:26,242 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:26,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:26,242 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 [2018-12-24 14:32:26,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:26,251 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:26,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:26,292 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 [2018-12-24 14:32:26,295 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 [2018-12-24 14:32:26,304 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,308 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,308 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 [2018-12-24 14:32:26,311 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,313 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,315 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,315 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 [2018-12-24 14:32:26,323 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,324 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,325 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,326 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,327 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 [2018-12-24 14:32:26,332 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,333 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,335 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,336 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,338 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,339 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 [2018-12-24 14:32:26,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,346 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,347 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,348 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,350 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,351 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,352 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 [2018-12-24 14:32:26,364 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 [2018-12-24 14:32:26,365 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:26,422 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:26,468 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:26,504 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:26,533 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:26,556 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:26,575 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:26,593 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:26,636 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,637 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 [2018-12-24 14:32:26,681 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,682 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,683 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 [2018-12-24 14:32:26,730 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,731 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,732 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,733 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,734 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 [2018-12-24 14:32:26,791 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,792 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,793 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,794 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,795 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,796 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,797 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 [2018-12-24 14:32:26,866 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,867 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,868 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,869 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,870 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,871 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,872 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,873 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,874 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 [2018-12-24 14:32:26,964 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,966 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,968 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,969 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,970 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,971 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,972 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,973 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,974 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,975 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 [2018-12-24 14:32:26,975 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:27,012 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:27,050 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:27,089 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:27,128 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:27,168 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:27,236 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:27,237 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2018-12-24 14:32:27,273 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:27,273 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 [2018-12-24 14:32:27,274 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:27,338 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. [2018-12-24 14:32:27,338 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2018-12-24 14:32:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:27,356 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:27,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:27,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:32:27,384 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:27,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:32:27,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:32:27,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:32:27,385 INFO L87 Difference]: Start difference. First operand 78 states and 438 transitions. Second operand 6 states. [2018-12-24 14:32:27,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:27,704 INFO L93 Difference]: Finished difference Result 104 states and 471 transitions. [2018-12-24 14:32:27,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:32:27,704 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2018-12-24 14:32:27,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:27,706 INFO L225 Difference]: With dead ends: 104 [2018-12-24 14:32:27,706 INFO L226 Difference]: Without dead ends: 103 [2018-12-24 14:32:27,706 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 [2018-12-24 14:32:27,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-12-24 14:32:27,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2018-12-24 14:32:27,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-12-24 14:32:27,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2018-12-24 14:32:27,726 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2018-12-24 14:32:27,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:27,726 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2018-12-24 14:32:27,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:32:27,726 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2018-12-24 14:32:27,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:32:27,727 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:27,727 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:32:27,727 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:27,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:27,727 INFO L82 PathProgramCache]: Analyzing trace with hash 945816, now seen corresponding path program 1 times [2018-12-24 14:32:27,727 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:27,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:27,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:27,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:27,728 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:27,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:27,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:27,775 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:27,776 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:32:27,776 INFO L207 CegarAbsIntRunner]: [0], [22], [36], [37] [2018-12-24 14:32:27,778 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:27,778 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:27,968 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:27,968 INFO L272 AbstractInterpreter]: Visited 4 different actions 6 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:32:27,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:27,969 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:27,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:27,969 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 [2018-12-24 14:32:27,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:27,997 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:28,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:28,010 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 [2018-12-24 14:32:28,019 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2018-12-24 14:32:28,025 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,027 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,028 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 [2018-12-24 14:32:28,034 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,036 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,038 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 [2018-12-24 14:32:28,045 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,051 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,054 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,054 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,055 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 [2018-12-24 14:32:28,059 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,065 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,067 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,068 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,069 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 [2018-12-24 14:32:28,074 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,078 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,084 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,086 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,087 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2018-12-24 14:32:28,102 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 [2018-12-24 14:32:28,103 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:28,163 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:28,205 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:28,240 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:28,268 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:28,289 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:28,307 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:28,324 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:28,360 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 [2018-12-24 14:32:28,382 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,385 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,385 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 [2018-12-24 14:32:28,427 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,429 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,431 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,433 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2018-12-24 14:32:28,485 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,486 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,487 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,488 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,490 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,492 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,492 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 [2018-12-24 14:32:28,557 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,559 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,561 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,562 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,563 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,564 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,566 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,567 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 [2018-12-24 14:32:28,646 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,648 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,650 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,651 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,652 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,653 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,654 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,655 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,657 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,658 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 [2018-12-24 14:32:28,659 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:28,695 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:28,731 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:28,767 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:28,804 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:28,843 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:28,909 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:28,909 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2018-12-24 14:32:28,940 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,941 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 [2018-12-24 14:32:28,942 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:29,003 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. [2018-12-24 14:32:29,004 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2018-12-24 14:32:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:29,022 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:29,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:29,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:29,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:32:29,051 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:29,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:32:29,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:32:29,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:32:29,051 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 6 states. [2018-12-24 14:32:29,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:29,373 INFO L93 Difference]: Finished difference Result 108 states and 483 transitions. [2018-12-24 14:32:29,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:32:29,373 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2018-12-24 14:32:29,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:29,375 INFO L225 Difference]: With dead ends: 108 [2018-12-24 14:32:29,375 INFO L226 Difference]: Without dead ends: 107 [2018-12-24 14:32:29,375 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:32:29,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-12-24 14:32:29,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2018-12-24 14:32:29,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-12-24 14:32:29,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2018-12-24 14:32:29,394 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2018-12-24 14:32:29,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:29,394 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2018-12-24 14:32:29,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:32:29,394 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2018-12-24 14:32:29,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:32:29,395 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:29,395 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:32:29,395 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:29,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:29,395 INFO L82 PathProgramCache]: Analyzing trace with hash 945008, now seen corresponding path program 1 times [2018-12-24 14:32:29,395 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:29,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:29,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:29,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:29,396 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:29,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:29,539 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:29,539 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:32:29,539 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [35] [2018-12-24 14:32:29,540 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:29,540 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:29,798 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:29,799 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:32:29,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:29,799 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:29,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:29,799 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 [2018-12-24 14:32:29,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:29,808 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:29,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:29,855 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,856 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 [2018-12-24 14:32:29,904 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,905 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,906 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 [2018-12-24 14:32:29,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,959 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,960 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,960 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 [2018-12-24 14:32:30,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,023 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,024 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,025 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2018-12-24 14:32:30,095 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,095 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,096 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,097 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,098 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,100 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,103 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2018-12-24 14:32:30,191 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,192 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,193 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,194 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,195 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,196 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,200 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,202 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 [2018-12-24 14:32:30,202 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:30,242 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:30,282 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:30,323 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:30,364 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:30,406 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:30,458 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 [2018-12-24 14:32:30,462 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 [2018-12-24 14:32:30,465 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 [2018-12-24 14:32:30,470 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 [2018-12-24 14:32:30,472 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 [2018-12-24 14:32:30,476 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 [2018-12-24 14:32:30,479 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 [2018-12-24 14:32:30,492 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2018-12-24 14:32:30,492 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:30,546 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:30,586 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:30,617 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:30,642 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:30,662 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:30,688 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:30,703 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:30,772 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:30,772 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2018-12-24 14:32:30,820 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,821 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2018-12-24 14:32:30,822 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:30,884 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:30,884 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2018-12-24 14:32:30,959 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:30,981 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:31,003 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:31,026 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:31,052 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:31,073 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:31,078 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:31,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:31,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:31,080 INFO L303 Elim1Store]: Index analysis took 165 ms [2018-12-24 14:32:31,080 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 [2018-12-24 14:32:31,081 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:31,149 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. [2018-12-24 14:32:31,150 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2018-12-24 14:32:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:31,172 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:31,220 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:31,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:32:31,221 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:31,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:32:31,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:32:31,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:32:31,221 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 8 states. [2018-12-24 14:32:32,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:32,751 INFO L93 Difference]: Finished difference Result 154 states and 652 transitions. [2018-12-24 14:32:32,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:32:32,754 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:32:32,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:32,755 INFO L225 Difference]: With dead ends: 154 [2018-12-24 14:32:32,755 INFO L226 Difference]: Without dead ends: 153 [2018-12-24 14:32:32,756 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:32:32,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-12-24 14:32:32,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 92. [2018-12-24 14:32:32,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-12-24 14:32:32,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 556 transitions. [2018-12-24 14:32:32,779 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 556 transitions. Word has length 4 [2018-12-24 14:32:32,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:32,779 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 556 transitions. [2018-12-24 14:32:32,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:32:32,779 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 556 transitions. [2018-12-24 14:32:32,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:32:32,780 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:32,780 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:32:32,780 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:32,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:32,781 INFO L82 PathProgramCache]: Analyzing trace with hash 945504, now seen corresponding path program 1 times [2018-12-24 14:32:32,781 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:32,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:32,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:32,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:32,782 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:32,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:32,932 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:32,933 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:32:32,933 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [35] [2018-12-24 14:32:32,934 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:32,934 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:33,184 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:33,185 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:32:33,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:33,185 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:33,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:33,185 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 [2018-12-24 14:32:33,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:33,194 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:33,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:33,243 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 [2018-12-24 14:32:33,247 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 [2018-12-24 14:32:33,252 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,254 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,254 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 [2018-12-24 14:32:33,264 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,266 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,268 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,268 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 [2018-12-24 14:32:33,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,279 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,281 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,284 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,284 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 [2018-12-24 14:32:33,292 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,294 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,296 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,296 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,298 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,299 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 [2018-12-24 14:32:33,305 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,307 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,309 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,311 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,313 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,315 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,315 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 [2018-12-24 14:32:33,341 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2018-12-24 14:32:33,342 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:33,402 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:33,448 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:33,484 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:33,513 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:33,537 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:33,557 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:33,575 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:33,620 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,620 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 [2018-12-24 14:32:33,662 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,663 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,664 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 [2018-12-24 14:32:33,713 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,715 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,716 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,717 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,718 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 [2018-12-24 14:32:33,776 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,777 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,778 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,780 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,781 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,783 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 [2018-12-24 14:32:33,853 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,854 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,855 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,856 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,858 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,859 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,861 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,862 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 [2018-12-24 14:32:33,953 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,954 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,955 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,958 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,959 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,960 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,961 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,962 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,963 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,964 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 [2018-12-24 14:32:33,965 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:34,003 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:34,042 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:34,081 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:34,120 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:34,185 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:34,252 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. [2018-12-24 14:32:34,252 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2018-12-24 14:32:34,300 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:34,301 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 126 [2018-12-24 14:32:34,301 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:34,365 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:34,366 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2018-12-24 14:32:34,392 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:34,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:34,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:34,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:34,395 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:34,396 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:34,397 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:34,398 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:34,400 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:34,400 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 [2018-12-24 14:32:34,401 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:34,468 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. [2018-12-24 14:32:34,468 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2018-12-24 14:32:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:34,490 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:34,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:34,543 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:34,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:32:34,543 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:34,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:32:34,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:32:34,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:32:34,544 INFO L87 Difference]: Start difference. First operand 92 states and 556 transitions. Second operand 8 states. [2018-12-24 14:32:35,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:35,221 INFO L93 Difference]: Finished difference Result 148 states and 688 transitions. [2018-12-24 14:32:35,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:32:35,221 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:32:35,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:35,223 INFO L225 Difference]: With dead ends: 148 [2018-12-24 14:32:35,224 INFO L226 Difference]: Without dead ends: 146 [2018-12-24 14:32:35,224 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 [2018-12-24 14:32:35,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-12-24 14:32:35,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2018-12-24 14:32:35,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-12-24 14:32:35,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 590 transitions. [2018-12-24 14:32:35,245 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 590 transitions. Word has length 4 [2018-12-24 14:32:35,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:35,245 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 590 transitions. [2018-12-24 14:32:35,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:32:35,245 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 590 transitions. [2018-12-24 14:32:35,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:32:35,246 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:35,246 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:32:35,246 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:35,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:35,247 INFO L82 PathProgramCache]: Analyzing trace with hash 933972, now seen corresponding path program 1 times [2018-12-24 14:32:35,247 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:35,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:35,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:35,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:35,248 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:35,421 WARN L181 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2018-12-24 14:32:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:35,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:35,443 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:35,443 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:32:35,443 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [35] [2018-12-24 14:32:35,444 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:35,444 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:35,696 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:35,696 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:32:35,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:35,697 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:35,697 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:35,697 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 [2018-12-24 14:32:35,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:35,706 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:35,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:35,771 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 [2018-12-24 14:32:35,775 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:32:35,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:35,785 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:35,785 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 [2018-12-24 14:32:35,791 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:35,794 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:35,796 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:35,796 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 [2018-12-24 14:32:35,800 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:35,801 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:35,803 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:35,805 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:35,806 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 [2018-12-24 14:32:35,817 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:35,818 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:35,819 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:35,820 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:35,821 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:35,822 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2018-12-24 14:32:35,828 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:35,829 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:35,831 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:35,832 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:35,834 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:35,835 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:35,837 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 [2018-12-24 14:32:35,848 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2018-12-24 14:32:35,849 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:35,906 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:35,948 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:35,983 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:36,012 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:36,035 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:36,055 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:36,073 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:36,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,116 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2018-12-24 14:32:36,158 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,159 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,160 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2018-12-24 14:32:36,204 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,206 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,207 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,209 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 [2018-12-24 14:32:36,263 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,265 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,266 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,267 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,268 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,269 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,270 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 [2018-12-24 14:32:36,341 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,343 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,345 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,346 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,347 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,348 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,349 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,350 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 [2018-12-24 14:32:36,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,440 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,441 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,442 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,443 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,444 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,445 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,446 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,447 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,448 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,449 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 [2018-12-24 14:32:36,450 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:36,488 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:36,527 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:36,566 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:36,605 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:36,644 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:36,712 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:36,713 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2018-12-24 14:32:36,763 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,764 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2018-12-24 14:32:36,764 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:36,832 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:36,832 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2018-12-24 14:32:36,858 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,859 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,859 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,861 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,862 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,863 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,864 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,865 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:36,866 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 [2018-12-24 14:32:36,867 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:36,932 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. [2018-12-24 14:32:36,933 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:82 [2018-12-24 14:32:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:36,954 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:36,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:36,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:36,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:32:36,995 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:36,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:32:36,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:32:36,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:32:36,995 INFO L87 Difference]: Start difference. First operand 103 states and 590 transitions. Second operand 8 states. [2018-12-24 14:32:37,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:37,470 INFO L93 Difference]: Finished difference Result 145 states and 646 transitions. [2018-12-24 14:32:37,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:32:37,470 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:32:37,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:37,472 INFO L225 Difference]: With dead ends: 145 [2018-12-24 14:32:37,472 INFO L226 Difference]: Without dead ends: 143 [2018-12-24 14:32:37,473 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:32:37,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-12-24 14:32:37,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2018-12-24 14:32:37,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-12-24 14:32:37,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 599 transitions. [2018-12-24 14:32:37,492 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 599 transitions. Word has length 4 [2018-12-24 14:32:37,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:37,492 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 599 transitions. [2018-12-24 14:32:37,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:32:37,493 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 599 transitions. [2018-12-24 14:32:37,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:32:37,493 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:37,493 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:32:37,494 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:37,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:37,494 INFO L82 PathProgramCache]: Analyzing trace with hash 938128, now seen corresponding path program 1 times [2018-12-24 14:32:37,494 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:37,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:37,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:37,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:37,495 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:37,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:37,588 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:37,588 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:32:37,589 INFO L207 CegarAbsIntRunner]: [0], [14], [36], [37] [2018-12-24 14:32:37,592 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:37,592 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:37,771 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:37,771 INFO L272 AbstractInterpreter]: Visited 4 different actions 6 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:32:37,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:37,772 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:37,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:37,772 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 [2018-12-24 14:32:37,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:37,783 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:37,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:37,794 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 [2018-12-24 14:32:37,798 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2018-12-24 14:32:37,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,810 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2018-12-24 14:32:37,816 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,818 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,820 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,820 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 [2018-12-24 14:32:37,828 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,832 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,833 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,835 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,836 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 [2018-12-24 14:32:37,843 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,845 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,849 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,851 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,853 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,854 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2018-12-24 14:32:37,863 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,866 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,869 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,871 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,873 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,873 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,874 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 [2018-12-24 14:32:37,887 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 [2018-12-24 14:32:37,888 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:37,944 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:37,986 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:38,019 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:38,050 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:38,071 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:38,088 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:38,106 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:38,144 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 [2018-12-24 14:32:38,166 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,168 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,169 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 [2018-12-24 14:32:38,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,211 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,214 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,215 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,216 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 [2018-12-24 14:32:38,312 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,313 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,314 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,315 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,317 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,319 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,319 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 [2018-12-24 14:32:38,385 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,386 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,388 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,389 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,390 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,391 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,392 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,395 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 [2018-12-24 14:32:38,477 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,482 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,483 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,484 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,485 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,486 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,488 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,489 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 [2018-12-24 14:32:38,490 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:38,524 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:38,560 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:38,597 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:38,634 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:38,674 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:38,739 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:38,740 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2018-12-24 14:32:38,806 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,806 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 [2018-12-24 14:32:38,807 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:38,867 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. [2018-12-24 14:32:38,867 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2018-12-24 14:32:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:38,920 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:38,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:38,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:32:38,951 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:38,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:32:38,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:32:38,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:32:38,952 INFO L87 Difference]: Start difference. First operand 104 states and 599 transitions. Second operand 6 states. [2018-12-24 14:32:39,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:39,433 INFO L93 Difference]: Finished difference Result 124 states and 613 transitions. [2018-12-24 14:32:39,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:32:39,433 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2018-12-24 14:32:39,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:39,435 INFO L225 Difference]: With dead ends: 124 [2018-12-24 14:32:39,435 INFO L226 Difference]: Without dead ends: 123 [2018-12-24 14:32:39,435 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:32:39,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-12-24 14:32:39,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2018-12-24 14:32:39,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-12-24 14:32:39,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 598 transitions. [2018-12-24 14:32:39,457 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 598 transitions. Word has length 4 [2018-12-24 14:32:39,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:39,457 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 598 transitions. [2018-12-24 14:32:39,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:32:39,457 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 598 transitions. [2018-12-24 14:32:39,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:32:39,458 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:39,458 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:32:39,459 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:39,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:39,459 INFO L82 PathProgramCache]: Analyzing trace with hash 937816, now seen corresponding path program 1 times [2018-12-24 14:32:39,459 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:39,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:39,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:39,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:39,460 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:39,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:39,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:39,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:39,595 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:39,595 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:32:39,595 INFO L207 CegarAbsIntRunner]: [0], [14], [26], [35] [2018-12-24 14:32:39,597 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:39,597 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:39,882 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:39,882 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:32:39,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:39,883 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:39,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:39,883 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 [2018-12-24 14:32:39,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:39,891 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:39,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:39,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:39,939 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 [2018-12-24 14:32:39,941 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 [2018-12-24 14:32:39,946 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:39,948 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:39,948 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 [2018-12-24 14:32:39,953 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:39,955 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:39,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:39,957 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 [2018-12-24 14:32:39,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:39,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:39,969 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:39,970 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:39,971 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2018-12-24 14:32:39,979 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:39,980 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:39,981 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:39,982 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:39,983 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:39,983 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 [2018-12-24 14:32:39,990 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:39,991 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:39,993 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:39,995 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:39,996 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:39,998 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:39,999 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 [2018-12-24 14:32:40,010 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 [2018-12-24 14:32:40,011 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:40,069 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:40,113 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:40,148 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:40,177 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:40,199 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:40,219 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:40,237 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:40,279 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,279 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2018-12-24 14:32:40,325 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,327 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,327 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 [2018-12-24 14:32:40,373 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,374 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,376 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,377 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,377 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 [2018-12-24 14:32:40,434 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,435 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,437 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,439 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,440 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,441 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 [2018-12-24 14:32:40,512 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,513 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,514 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,515 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,518 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,519 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,520 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,521 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 [2018-12-24 14:32:40,610 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,611 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,612 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,613 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,614 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,615 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,616 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,617 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,618 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,619 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,620 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 [2018-12-24 14:32:40,621 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:40,659 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:40,697 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:40,735 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:40,774 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:40,813 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:40,881 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:40,882 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2018-12-24 14:32:40,964 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:40,965 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 [2018-12-24 14:32:40,966 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:41,030 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:41,031 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2018-12-24 14:32:41,059 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:41,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:41,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:41,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:41,063 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:41,065 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:41,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:41,122 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:41,144 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:41,145 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 [2018-12-24 14:32:41,146 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:41,326 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. [2018-12-24 14:32:41,326 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2018-12-24 14:32:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:41,349 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:41,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:41,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:32:41,395 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:41,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:32:41,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:32:41,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:32:41,396 INFO L87 Difference]: Start difference. First operand 104 states and 598 transitions. Second operand 8 states. [2018-12-24 14:32:42,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:42,238 INFO L93 Difference]: Finished difference Result 176 states and 800 transitions. [2018-12-24 14:32:42,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:32:42,239 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:32:42,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:42,241 INFO L225 Difference]: With dead ends: 176 [2018-12-24 14:32:42,241 INFO L226 Difference]: Without dead ends: 174 [2018-12-24 14:32:42,241 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 [2018-12-24 14:32:42,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-12-24 14:32:42,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 108. [2018-12-24 14:32:42,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-12-24 14:32:42,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2018-12-24 14:32:42,264 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2018-12-24 14:32:42,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:42,264 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2018-12-24 14:32:42,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:32:42,265 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2018-12-24 14:32:42,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:32:42,265 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:42,265 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:32:42,265 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:42,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:42,266 INFO L82 PathProgramCache]: Analyzing trace with hash 953504, now seen corresponding path program 1 times [2018-12-24 14:32:42,266 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:42,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:42,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:42,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:42,267 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:42,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:42,409 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:42,409 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:32:42,409 INFO L207 CegarAbsIntRunner]: [0], [30], [36], [37] [2018-12-24 14:32:42,410 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:42,410 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:42,595 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:42,596 INFO L272 AbstractInterpreter]: Visited 4 different actions 6 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:32:42,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:42,596 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:42,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:42,596 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 [2018-12-24 14:32:42,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:42,605 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:42,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:42,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:42,616 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 [2018-12-24 14:32:42,651 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,655 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,655 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 [2018-12-24 14:32:42,705 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,706 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,708 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,709 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,710 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 [2018-12-24 14:32:42,761 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,762 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,763 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,764 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,765 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,768 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,768 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 [2018-12-24 14:32:42,835 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,836 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,837 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,838 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,839 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,840 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,842 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,844 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,845 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 [2018-12-24 14:32:42,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,929 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,930 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,931 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,932 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,933 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,934 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,936 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,937 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,939 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:42,940 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 [2018-12-24 14:32:42,940 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:42,979 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:43,016 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:43,055 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:43,094 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:43,136 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:43,181 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 [2018-12-24 14:32:43,187 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2018-12-24 14:32:43,193 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2018-12-24 14:32:43,198 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 [2018-12-24 14:32:43,202 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 [2018-12-24 14:32:43,209 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 [2018-12-24 14:32:43,215 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2018-12-24 14:32:43,229 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 [2018-12-24 14:32:43,230 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:43,279 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:43,318 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:43,347 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:43,372 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:43,391 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:43,407 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:43,421 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:43,486 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:43,487 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2018-12-24 14:32:43,522 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:43,523 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 46 treesize of output 122 [2018-12-24 14:32:43,523 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:43,581 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. [2018-12-24 14:32:43,582 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2018-12-24 14:32:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:43,631 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:43,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:43,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:32:43,660 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:43,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:32:43,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:32:43,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:32:43,661 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 6 states. [2018-12-24 14:32:43,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:43,947 INFO L93 Difference]: Finished difference Result 135 states and 696 transitions. [2018-12-24 14:32:43,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:32:43,947 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2018-12-24 14:32:43,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:43,949 INFO L225 Difference]: With dead ends: 135 [2018-12-24 14:32:43,949 INFO L226 Difference]: Without dead ends: 134 [2018-12-24 14:32:43,950 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 [2018-12-24 14:32:43,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-12-24 14:32:43,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 108. [2018-12-24 14:32:43,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-12-24 14:32:43,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2018-12-24 14:32:43,974 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2018-12-24 14:32:43,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:43,974 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2018-12-24 14:32:43,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:32:43,974 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2018-12-24 14:32:43,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:32:43,975 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:43,975 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:32:43,975 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:43,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:43,975 INFO L82 PathProgramCache]: Analyzing trace with hash 29600478, now seen corresponding path program 1 times [2018-12-24 14:32:43,975 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:43,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:43,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:43,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:43,976 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:44,195 WARN L181 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 16 [2018-12-24 14:32:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:44,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:44,289 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:44,289 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:32:44,289 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [32], [35] [2018-12-24 14:32:44,290 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:44,290 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:44,981 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:44,982 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. [2018-12-24 14:32:44,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:44,982 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:44,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:44,982 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 [2018-12-24 14:32:44,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:44,991 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:44,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:45,128 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2018-12-24 14:32:45,130 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 [2018-12-24 14:32:45,132 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:32:45,137 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,138 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,138 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 [2018-12-24 14:32:45,142 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,143 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,144 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,145 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2018-12-24 14:32:45,150 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,151 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,152 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,153 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,154 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 [2018-12-24 14:32:45,158 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,159 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,160 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,161 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,162 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,163 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 [2018-12-24 14:32:45,168 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,169 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,170 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,171 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,172 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,175 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 [2018-12-24 14:32:45,180 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,181 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,182 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,184 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,185 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,186 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,187 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,188 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 [2018-12-24 14:32:45,189 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:45,268 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:45,314 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:45,350 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:45,379 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:45,403 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:45,421 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:45,440 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:45,491 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,492 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 [2018-12-24 14:32:45,543 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,544 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,544 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2018-12-24 14:32:45,599 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,601 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,602 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,604 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 [2018-12-24 14:32:45,667 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,669 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,670 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,672 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,674 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 [2018-12-24 14:32:45,749 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,750 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,751 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,752 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,753 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,755 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,756 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,757 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,758 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 [2018-12-24 14:32:45,858 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,859 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,861 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,862 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,863 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,864 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,865 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,867 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,868 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,869 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 [2018-12-24 14:32:45,992 WARN L181 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-12-24 14:32:45,996 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,997 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,998 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:45,999 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,000 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,001 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,002 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,003 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,004 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,006 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,007 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,008 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,009 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 [2018-12-24 14:32:46,009 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:46,064 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:46,119 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:46,176 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:46,233 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:46,291 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:46,350 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:46,442 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:46,443 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2018-12-24 14:32:46,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,479 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 [2018-12-24 14:32:46,480 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:46,570 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:46,571 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2018-12-24 14:32:46,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,605 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,606 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,607 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,610 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,611 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,612 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,612 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:46,613 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 [2018-12-24 14:32:46,614 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:46,707 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. [2018-12-24 14:32:46,708 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2018-12-24 14:32:46,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,746 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,748 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,749 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,751 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,752 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,753 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,754 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,755 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,756 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,757 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,758 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,759 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:46,760 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 [2018-12-24 14:32:46,761 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:46,851 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. [2018-12-24 14:32:46,851 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:89 [2018-12-24 14:32:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:46,878 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:46,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:46,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:32:46,934 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:46,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:32:46,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:32:46,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:32:46,935 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 10 states. [2018-12-24 14:32:47,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:47,959 INFO L93 Difference]: Finished difference Result 212 states and 968 transitions. [2018-12-24 14:32:47,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:32:47,960 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:32:47,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:47,962 INFO L225 Difference]: With dead ends: 212 [2018-12-24 14:32:47,963 INFO L226 Difference]: Without dead ends: 205 [2018-12-24 14:32:47,963 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 [2018-12-24 14:32:47,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-12-24 14:32:47,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 122. [2018-12-24 14:32:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-12-24 14:32:47,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 789 transitions. [2018-12-24 14:32:47,997 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 789 transitions. Word has length 5 [2018-12-24 14:32:47,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:47,997 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 789 transitions. [2018-12-24 14:32:47,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:32:47,998 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 789 transitions. [2018-12-24 14:32:47,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:32:47,998 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:47,999 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:32:47,999 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:47,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:47,999 INFO L82 PathProgramCache]: Analyzing trace with hash 29600106, now seen corresponding path program 1 times [2018-12-24 14:32:47,999 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:48,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:48,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:48,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:48,000 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:48,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:48,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:48,104 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:48,104 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:32:48,104 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [32], [35] [2018-12-24 14:32:48,105 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:48,105 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:48,855 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:48,856 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. [2018-12-24 14:32:48,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:48,856 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:48,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:48,856 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 [2018-12-24 14:32:48,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:48,865 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:48,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:48,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:48,920 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:48,921 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 [2018-12-24 14:32:48,986 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:48,988 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:48,989 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 [2018-12-24 14:32:49,042 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,045 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,048 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,050 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,051 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 [2018-12-24 14:32:49,117 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,119 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,123 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,124 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,126 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,127 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 [2018-12-24 14:32:49,206 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,209 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,212 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,215 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,217 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,220 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,223 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,225 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,225 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 [2018-12-24 14:32:49,329 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,332 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,335 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,337 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,339 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,341 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,347 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,349 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,352 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,352 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 [2018-12-24 14:32:49,473 WARN L181 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-12-24 14:32:49,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,483 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,485 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,486 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,487 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,488 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,490 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,491 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,493 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,494 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,496 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:49,497 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 [2018-12-24 14:32:49,498 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:49,561 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:49,627 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:49,698 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:49,765 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:49,831 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:49,905 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:49,987 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 [2018-12-24 14:32:49,990 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 [2018-12-24 14:32:49,994 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 [2018-12-24 14:32:49,997 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 [2018-12-24 14:32:50,000 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:32:50,004 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:32:50,008 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 [2018-12-24 14:32:50,012 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 [2018-12-24 14:32:50,013 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:50,083 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:50,124 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:50,154 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:50,177 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:50,195 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:50,212 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:50,228 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:50,320 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:50,321 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2018-12-24 14:32:50,356 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:50,356 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 [2018-12-24 14:32:50,357 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:50,447 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:50,447 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2018-12-24 14:32:50,497 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:50,498 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:50,499 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:50,500 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:50,501 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:50,502 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:50,504 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:50,505 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:50,506 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:50,506 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:50,507 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 [2018-12-24 14:32:50,508 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:50,599 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. [2018-12-24 14:32:50,599 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2018-12-24 14:32:50,634 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:50,635 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:50,636 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:50,637 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:50,638 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:50,639 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:50,641 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:50,642 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:50,643 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:50,644 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:50,645 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:50,647 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:50,648 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:50,648 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:50,649 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 [2018-12-24 14:32:50,650 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:50,740 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. [2018-12-24 14:32:50,741 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2018-12-24 14:32:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:50,773 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:50,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:50,830 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:50,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:32:50,830 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:50,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:32:50,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:32:50,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:32:50,831 INFO L87 Difference]: Start difference. First operand 122 states and 789 transitions. Second operand 10 states. [2018-12-24 14:32:56,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:56,698 INFO L93 Difference]: Finished difference Result 169 states and 850 transitions. [2018-12-24 14:32:56,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:32:56,699 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:32:56,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:56,701 INFO L225 Difference]: With dead ends: 169 [2018-12-24 14:32:56,701 INFO L226 Difference]: Without dead ends: 168 [2018-12-24 14:32:56,702 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:32:56,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-12-24 14:32:56,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2018-12-24 14:32:56,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-12-24 14:32:56,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 762 transitions. [2018-12-24 14:32:56,736 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 762 transitions. Word has length 5 [2018-12-24 14:32:56,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:56,737 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 762 transitions. [2018-12-24 14:32:56,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:32:56,737 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 762 transitions. [2018-12-24 14:32:56,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:32:56,737 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:56,738 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:32:56,738 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:56,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:56,738 INFO L82 PathProgramCache]: Analyzing trace with hash 29600602, now seen corresponding path program 1 times [2018-12-24 14:32:56,738 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:56,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:56,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:56,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:56,739 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:56,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:56,860 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:56,860 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:32:56,860 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [32], [35] [2018-12-24 14:32:56,864 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:56,864 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:57,584 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:57,584 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. [2018-12-24 14:32:57,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:57,584 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:57,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:57,584 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 14:32:57,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:57,593 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:57,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:57,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:57,636 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:57,636 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 [2018-12-24 14:32:57,695 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:57,697 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:57,697 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 [2018-12-24 14:32:57,753 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:57,754 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:57,755 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:57,757 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:57,757 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 [2018-12-24 14:32:57,824 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:57,824 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:57,825 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:57,826 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:57,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:57,829 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:57,829 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2018-12-24 14:32:57,911 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:57,912 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:57,913 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:57,914 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:57,915 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:57,917 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:57,918 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:57,919 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:57,920 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 [2018-12-24 14:32:58,021 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,023 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,024 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,026 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,027 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,028 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,029 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,030 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,031 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,032 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 [2018-12-24 14:32:58,153 WARN L181 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-12-24 14:32:58,157 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,159 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,160 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,161 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,162 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,163 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,165 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,166 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,167 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,168 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,169 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,170 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,171 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 [2018-12-24 14:32:58,172 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:58,229 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:58,286 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:58,346 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:58,405 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:58,465 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:58,527 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:58,598 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 [2018-12-24 14:32:58,601 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2018-12-24 14:32:58,605 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 [2018-12-24 14:32:58,608 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 [2018-12-24 14:32:58,612 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 [2018-12-24 14:32:58,615 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 [2018-12-24 14:32:58,619 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 [2018-12-24 14:32:58,623 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 [2018-12-24 14:32:58,624 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:58,720 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:58,760 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:58,792 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:58,817 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:58,837 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:58,855 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:58,869 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:58,966 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:58,967 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2018-12-24 14:32:59,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,018 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 [2018-12-24 14:32:59,019 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:59,108 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:59,108 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2018-12-24 14:32:59,142 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,143 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,143 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,145 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,146 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,147 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,148 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,149 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,150 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,150 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:59,151 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 [2018-12-24 14:32:59,152 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:59,243 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. [2018-12-24 14:32:59,244 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2018-12-24 14:32:59,296 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,297 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,298 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,299 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,300 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,302 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,303 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,304 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,305 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,306 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,308 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,309 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,310 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,310 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:59,311 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 [2018-12-24 14:32:59,312 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:59,403 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. [2018-12-24 14:32:59,403 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2018-12-24 14:32:59,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:59,470 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:59,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:59,529 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:59,529 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:32:59,529 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:59,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:32:59,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:32:59,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:32:59,530 INFO L87 Difference]: Start difference. First operand 119 states and 762 transitions. Second operand 10 states. [2018-12-24 14:33:01,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:33:01,140 INFO L93 Difference]: Finished difference Result 176 states and 845 transitions. [2018-12-24 14:33:01,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:33:01,141 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:33:01,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:33:01,144 INFO L225 Difference]: With dead ends: 176 [2018-12-24 14:33:01,144 INFO L226 Difference]: Without dead ends: 172 [2018-12-24 14:33:01,146 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:33:01,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-12-24 14:33:01,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 125. [2018-12-24 14:33:01,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-12-24 14:33:01,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 788 transitions. [2018-12-24 14:33:01,179 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 788 transitions. Word has length 5 [2018-12-24 14:33:01,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:33:01,180 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 788 transitions. [2018-12-24 14:33:01,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:33:01,180 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 788 transitions. [2018-12-24 14:33:01,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:33:01,180 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:33:01,180 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:33:01,181 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:33:01,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:33:01,181 INFO L82 PathProgramCache]: Analyzing trace with hash 29588822, now seen corresponding path program 1 times [2018-12-24 14:33:01,181 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:33:01,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:33:01,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:33:01,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:33:01,182 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:33:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:33:01,350 WARN L181 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2018-12-24 14:33:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:33:01,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:33:01,395 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:33:01,395 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:33:01,395 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [32], [35] [2018-12-24 14:33:01,396 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:33:01,396 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:33:02,105 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:33:02,105 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. [2018-12-24 14:33:02,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:33:02,106 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:33:02,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:33:02,106 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 [2018-12-24 14:33:02,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:33:02,114 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:33:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:33:02,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:33:02,155 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,155 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 [2018-12-24 14:33:02,215 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,216 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,216 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 [2018-12-24 14:33:02,264 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,264 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,265 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,266 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,267 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 [2018-12-24 14:33:02,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,321 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,322 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,324 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,325 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,326 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,327 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2018-12-24 14:33:02,396 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,397 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,397 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,399 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,400 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,401 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,402 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,404 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 [2018-12-24 14:33:02,493 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,494 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,495 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,497 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,498 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,499 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,500 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,501 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,502 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,503 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,504 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 [2018-12-24 14:33:02,505 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:02,543 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:02,582 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:02,623 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:02,664 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:02,704 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:02,755 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2018-12-24 14:33:02,797 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 [2018-12-24 14:33:02,807 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 [2018-12-24 14:33:02,809 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 [2018-12-24 14:33:02,812 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2018-12-24 14:33:02,816 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 [2018-12-24 14:33:02,823 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2018-12-24 14:33:02,833 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 [2018-12-24 14:33:02,833 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:02,887 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:02,928 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:02,959 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:02,984 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:03,004 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:03,021 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:03,037 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:03,106 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:33:03,106 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2018-12-24 14:33:03,161 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:03,217 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 [2018-12-24 14:33:03,218 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2018-12-24 14:33:03,254 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2018-12-24 14:33:04,662 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. [2018-12-24 14:33:04,663 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:950 [2018-12-24 14:33:08,424 WARN L181 SmtUtils]: Spent 3.42 s on a formula simplification. DAG size of input: 478 DAG size of output: 183 [2018-12-24 14:33:08,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,433 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,433 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:33:08,434 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 128 treesize of output 146 [2018-12-24 14:33:08,434 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:08,665 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,666 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,667 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,668 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,670 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,672 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,674 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,674 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 [2018-12-24 14:33:08,675 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:08,888 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,889 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,890 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,891 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,893 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,894 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,895 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,896 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,897 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2018-12-24 14:33:08,898 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:09,111 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. [2018-12-24 14:33:09,111 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 18 variables, input treesize:373, output treesize:277 [2018-12-24 14:33:09,234 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,235 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,236 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,236 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,237 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,239 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,240 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,241 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,242 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,243 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,244 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,245 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,246 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,247 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,248 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,248 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:33:09,249 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 [2018-12-24 14:33:09,250 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:09,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,465 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,466 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,467 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,468 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,469 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,470 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,471 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,474 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,475 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,476 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,477 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,481 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 27 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 164 [2018-12-24 14:33:09,482 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:09,689 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,690 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 162 [2018-12-24 14:33:09,691 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:09,872 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. [2018-12-24 14:33:09,872 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:307, output treesize:237 [2018-12-24 14:33:10,261 WARN L181 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2018-12-24 14:33:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:33:10,263 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:33:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:33:10,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:33:10,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2018-12-24 14:33:10,302 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:33:10,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:33:10,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:33:10,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-12-24 14:33:10,303 INFO L87 Difference]: Start difference. First operand 125 states and 788 transitions. Second operand 10 states. [2018-12-24 14:33:10,644 WARN L181 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 127 [2018-12-24 14:33:17,874 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2018-12-24 14:33:17,876 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:102) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.pop(ManagedScript.java:131) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:652) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:256) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:164) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:715) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:628) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:472) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.io.IOException: Stream closed at java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:433) at java.io.OutputStream.write(OutputStream.java:116) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:297) at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141) at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229) at java.io.BufferedWriter.flush(BufferedWriter.java:254) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:120) ... 28 more [2018-12-24 14:33:17,881 INFO L168 Benchmark]: Toolchain (without parser) took 161764.25 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.1 GB). Free memory was 1.4 GB in the beginning and 2.5 GB in the end (delta: -1.1 GB). Peak memory consumption was 74.9 MB. Max. memory is 7.1 GB. [2018-12-24 14:33:17,882 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-24 14:33:17,882 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.84 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-24 14:33:17,882 INFO L168 Benchmark]: Boogie Preprocessor took 37.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-24 14:33:17,882 INFO L168 Benchmark]: RCFGBuilder took 657.95 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-12-24 14:33:17,882 INFO L168 Benchmark]: TraceAbstraction took 161001.81 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.1 GB). Free memory was 1.4 GB in the beginning and 2.5 GB in the end (delta: -1.1 GB). Peak memory consumption was 53.8 MB. Max. memory is 7.1 GB. [2018-12-24 14:33:17,884 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 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 62.84 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 37.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 657.95 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 161001.81 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.1 GB). Free memory was 1.4 GB in the beginning and 2.5 GB in the end (delta: -1.1 GB). Peak memory consumption was 53.8 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...